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Serve OpenAPI spec with single /openapi/v2 endpoint

**What this PR does / why we need it**:
We are deprecating format-separated endpoints (`/swagger.json`, `/swagger-2.0.0.json`, `/swagger-2.0.0.pb-v1`, `/swagger-2.0.0.pb-v1.gz`) for OpenAPI spec, and switching to a single `/openapi/v2` endpoint in Kubernetes 1.10. The design doc and deprecation process are tracked at: https://docs.google.com/document/d/19lEqE9lc4yHJ3WJAJxS_G7TcORIJXGHyq3wpwcH28nU

Requested format is specified by setting HTTP headers

header | possible values
-- | --
Accept | `application/json`, `application/com.github.proto-openapi.spec.v2@v1.0+protobuf`
Accept-Encoding | `gzip`

This PR changes dynamic_client (and kubectl as a result) to use the new endpoint. The old endpoints will remain in 1.10 and 1.11, and get removed in 1.12. 

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
action required: Deprecate format-separated endpoints for OpenAPI spec. Please use single `/openapi/v2` endpoint instead.
```

/sig api-machinery

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fix todo: add validate method for &schedulerapi.Policy in examples_test.go

**What this PR does / why we need it**:
fix todo: add validate method for &schedulerapi.Policy in examples_test.go
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Use `Int32Ptr` function from utils instead of self-written versions

**What this PR does / why we need it**:
Replaces instances of newInt{,32} with `Int32Ptr` function from `k8s.io/kubernetes/pkg/util/pointer`

**Which issue(s) this PR fixes**:
Fixes #59971

**Release note**:

```release-note
NONE
```

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Remove cassandra example.

**What this PR does / why we need it**:

Removes duplicated content from this repository and `kubernetes/examples`

https://github.com/kubernetes/examples/tree/master/cassandra

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Require boilerplate on Bazel Skylark source files

**What this PR does / why we need it**: `.bzl` files are also source code, so they should probably have the boilerplate text too.

**Release note**:

```release-note
NONE
```

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dockertools: disable MemorySwap on Linux

In this commit, set `MemorySwap` the same with `Memory` to prevent using swap on Linux.

**What this PR does / why we need it**:

In #39731, @pires tried to disable swap on Linux by setting `MemorySwap` to 0.
However, according to [Docker's docs](https://docs.docker.com/config/containers/resource_constraints/#--memory-swap-details), setting `MemorySwap` to 0 is treated as unset, and its [default behavior](https://github.com/moby/moby/blob/v17.05.0-ce/daemon/daemon_unix.go#L266-L269) is to set to twice the size of `Memory`, which can still cause the container to use the swap.

**Which issue(s) this PR fixes** :

This issue was mentioned in this comment: https://github.com/kubernetes/kubernetes/issues/7294#issuecomment-362722637

**Special notes for your reviewer**:

1. For the case on Windows, we can still use the 0 because [Windows does not support `MemorySwap`](https://github.com/moby/moby/blob/v17.05.0-ce/daemon/daemon_windows.go#L185-L187).
2. There is another place using the `DefaultMemorySwap()` is for [sandbox](https://github.com/kubernetes/kubernetes/blob/v1.9.2/pkg/kubelet/dockershim/docker_sandbox.go#L505).
Maybe setting the sandbox's `MemorySwap` to 0 is fine. I didn't change that.

**Release note**:

```release-note
dockertools: disable memory swap on Linux.
```

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some typo

**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note

```

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Add detailed err in ensure docker process error
Signed-off-by: Peng Gao <peng.gao.dut@gmail.com>



**What this PR does / why we need it**:
Add detailed error.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Fix the broken link in Markdown

**What this PR does / why we need it**: Fix the broken link in Markdown

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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fix incorrect comparison in /pkg/volume error message
Signed-off-by: allencloud <allen.sun@daocloud.io>



**What this PR does / why we need it**:
This PR fixes incorrect error message when there is comparison.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
NONE

**Special notes for your reviewer**:
NONE

**Release note**:

```release-note
NONE
```

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use GetUniqueVolumeNameFromSpec instead of implementing it manually for kubelet volume manager

**What this PR does / why we need it**:

`volumeName` is only used for attachable plugin, so we should resolve it inside the `if` statement. Besides, we can use the already exist `GetUniqueVolumeNameFromSpec` mthod instead of invoking `GetVolumeName` and `GetUniqueVolumeName` manually.

**Release note**:

```release-note
NONE
```

/sig storage
/kind cleanup

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Return missing ClusterID error instead of ignoring it

This fixes issue #57382. In the cases I'm aware of kubelet cannot function if it can't detect the cluster it is running in, so the error should be passed up to the caller preventing initialization when kubelet would fail. This way the error can be detected and kubelet startup attempted again later (giving AWS time to apply the tags).

```release-note
On AWS kubelet returns an error when started under conditions that do not allow it to work (AWS has not yet tagged the instance).
```

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dockershim: don't check pod IP in StopPodSandbox

We're about to tear the container down, there's no point.  It also suppresses
an annoying error message due to kubelet stupidity that causes multiple
parallel calls to StopPodSandbox for the same sandbox.

docker_sandbox.go:355] failed to read pod IP from plugin/docker: NetworkPlugin cni failed on the status hook for pod "docker-registry-1-deploy_default": Unexpected command output nsenter: cannot open /proc/22646/ns/net: No such file or directory

1) A first StopPodSandbox() request triggered by SyncLoop(PLEG) for
a ContainerDied event calls into TearDownPod() and thus the network
plugin.  Until this completes, networkReady=true for the
sandbox.

2) A second StopPodSandbox() request triggered by SyncLoop(REMOVE)
calls PodSandboxStatus() and calls into the network plugin to read
the IP address because networkReady=true

3) The first request exits the network plugin, sets networReady=false,
and calls StopContainer() on the sandbox.  This destroys the network
namespace.

4) The second request finally gets around to running nsenter but
the network namespace is already destroyed.  It returns an error
which is logged by getIP().

```release-note
NONE
```
@yujuhong @freehan

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Increase timeout of integration tests

**What this PR does / why we need it**:
In #24509 we intended to increase the timeout to 600s, but it was reverted by accident in #57521 when overriding of the value was enabled. The jenkins job should honor the default of 600s instead of continuing to override it to 300s.
This lead to flaky integration tests, specifically TestCRDDeletionCascading

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #59426

**Special notes for your reviewer**:

**Release note**:
```release-note
Increase timeout of integration tests
```

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auth: reregister auth providers

Alternatively we can register this in the mains of most (or all) components.

Fixes GKE e2es
Fixes: 5d721bff

That PR unregistered auth providers for kubectl and probably elsewhere.

```release-note
NONE
```

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Add myself to dep-approvers OWNER alias

Follow-up of https://github.com/kubernetes/kubernetes/pull/59587#issuecomment-368575420.

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Fix Deployment with Recreate strategy not to wait on Pods in terminal phase

**What this PR does / why we need it**:
Fixes Deployment with Recreate strategy not to wait on Pods in terminal phase. It can happen after eviction or failing to match selector and RS leaves such pod around right now. (Hopefully RC gets fixed separately.) 

**Which issue(s) this PR fixes** *:
Fixes https://github.com/kubernetes/kubernetes/issues/60162

**Special notes for your reviewer**:

**Release note**:

```release-note
Fixes a case when Deployment with recreate strategy could get stuck on old failed Pod.
```

/cc @janetkuo

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bzl: fix update-bazel.sh

pickup https://github.com/bazelbuild/bazel-gazelle/commit/a85b63b06c2e0c75931e57c4a1a18d4e566bb6f4

fixes #60439, fixes #60447
we need to vendor gazelle.

```release-note
NONE
```

pickup https://github.com/bazelbuild/bazel-gazelle/commit/a85b63b06c2e0c75931e57c4a1a18d4e566bb6f4

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Fix incorrectly formatted URL

**What this PR does / why we need it**:
Fix an incorrectly formatted URL in the v1.9 change log. (Have a separate PR in the website repo to fix the release note already imported.)

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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FIX the os.Stat() func in volume file/kind bug

**What this PR does / why we need it**:
FIX the os.Stat() func has two same and delete one
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Fix #59601: AWS: Check error code returned from describeVolume

The errors returned by the describeVolume call are not all equal:
if the error is of InvalidVolume.NotFound type it does not necessarily
mean the desired operation cannot be finished successfully.

Fixes #59601

```release-note
NONE
```

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Fix grammar issues and improve log in volume cache code

**What this PR does / why we need it**:
Fix grammar issues and improve log in volume cache code

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Introduce buffered audit backend

This is a copy from https://github.com/kubernetes/kubernetes/issues/53006 with comments addressed, since @hzxuzhonghu cannot work on this right now and the code freeze is close. Thanks @hzxuzhonghu for the contribution!

This is the first PR to fix https://github.com/kubernetes/kubernetes/issues/53006 and then https://github.com/kubernetes/kubernetes/issues/53020

This PR introduces a new audit backend, that batches incoming audit events and sends these batches to the underlying audit backend. This new backend is designed to replace existing batching webhook backend and allow to use batching with log backend, to solve the performance issues.

@sttts @ericchiang @CaoShuFeng @tallclair would really appreciate your review

```release-note
Buffered audit backend is introduced, to be used with other audit backends.
```

Fixes: 5d721bff

That PR unregistered auth providers for kubectl and probably elsewhere.

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Update dashboard version to v1.8.3

**What this PR does / why we need it:** Updates dashboard addon to the latest version. Changelog can be found [here](https://github.com/kubernetes/dashboard/releases/tag/v1.8.3).

**Release note**:

```release-note
Update dashboard version to v1.8.3
```

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add me to iptables/kube-proxy reviewers

kube-proxy needs reviewers!

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rebreak the filter

Pull https://github.com/kubernetes/kubernetes/pull/60117/commits fixed a bug in the filtering code which was actually being exploited to get inconsistent printing behavior. This reverts the commit that "fixed" the inconsistency and adjusts the test back to the equivalent, pre-printing fixes.

/assign @soltysh 


```release-note
NONE
```

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remove default priority cache in Priority admission controller

**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes # https://github.com/kubernetes/kubernetes/issues/59679

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Delete the two same if in func TestPlugin

**What this PR does / why we need it**:
Delete the two same if in func TestPlugin
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

This reverts commit 799a0bf4.

This fixes issue #57382.

In practice these were in most cases required to exist, but kubelet did not
previously enforce this. It now does, so these tests need to change a bit.

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update GCE plugin for block support

update GCE plugin for block volume support

cc @gnufied @mtanino @jsafrane 
```release-note
GCE PD volume plugin got block volume support
```

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enable server-printing in tests

**Release note**:
```release-note
NONE
```

Depends on https://github.com/kubernetes/kubernetes/pull/55637

Separate pull to test the `--experimental-server-print` flag in test-cmd-util tests introduced in https://github.com/kubernetes/kubernetes/pull/55637

cc @soltysh

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Add smart retries to resource creations in testing framework

Fix https://github.com/kubernetes/kubernetes/issues/55860

/cc @wojtek-t 

```release-note
NONE
```