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Fix make verify

@thockin this fixes `make verify` which was previously failing due to undefined `BRANCH` and `VERBOSE` variables, ptal

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Add a flag for `kubectl expose`to set ClusterIP and allow headless services

- Use `--cluster-ip=None` to create a headless service
- Fixes #10294

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Fix markdown of flexvolume lvm example link

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Optimize pod affinity 2

Ref #26144

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separate out api group storage registration

Moves RESTStorage creation for API groups out of master.go proper and makes dependencies clear.  

This is prereq for being able to build the `RESTStorageProviders` as plugins.

@lavalamp This is the follow-on I promised.
@sttts ptal.

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optimise some code style in server.go

The PR modified some code style for authPathClientConfig and parseReservation function in server.go.

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[Federation] Downsize the release binary distribution.

There are two things that this PR implements:

1. It removes `federation-apiserver` and `federation-controller-manager` from binaries and docker_wrapped_binaries target lists.
2. Build the docker image for `hyperkube` on-the-fly while pushing the federation images. 

```release-note
Federation binaries and their corresponding docker images - `federation-apiserver` and `federation-controller-manager` are now folded in to the `hyperkube` binary. If you were using one of these binaries or docker images, please switch to using the `hyperkube` version. Please refer to the federation manifests - `federation/manifests/federation-apiserver.yaml` and `federation/manifests/federation-controller-manager-deployment.yaml` for examples.
```

cc @kubernetes/sig-cluster-federation @colhom 

Fixes Issue #28633

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Refactor uuid into its own pkg util/uuid

Continuing my work ref #15634

Anyone can review this if he/she wants.

Revert "Extend all to more resources"

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cluster/images/hyperkube: re-add hyperkube busybox style symlinks

Originally symlinks were added with a `--make-symlinks` command discussed in https://github.com/kubernetes/kubernetes/issues/24510 and implemented in https://github.com/kubernetes/kubernetes/pull/24511.

It was backed out in https://github.com/kubernetes/kubernetes/pull/25693 because go binaries don't run in qemu and this breaks cross-building the Dockerfile for arm. In this case, due to running `hyperkube --make-symlinks`.

Lets just add the symlinks manually until the upstream bug is fixed (qemu).

fixes #28702

@mikedanese @thockin @yifan-gu @euank 

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kubelet: move kuberuntime.go to api/services.go

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Add instructions for running version-skewed tests


Add instructions for running version-skewed tests

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Updated fluentd configuration to spawn multiple threads for processing

(by default, fluentd uses a single thread).

@a-robinson @igorpeshansky

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[Garbage Collector] GC waits for all reflectors to be synced before starting workers

Fix 28713. See https://github.com/kubernetes/kubernetes/issues/28713#issuecomment-234826276 for details on the cause of the flake. The test has passed 100 times locally.

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Print/log pointers of structs with %#v instead of %+v

There are many places in k8s where %+v is used to format a pointer to struct, which isn't working as expected.

Fixes #26591

Also add a testing package and add placeholders for fake services.

There are many places in k8s where %+v is used to format a pointer
to struct, which isn't working as expected.

Fixes #26591

This is only a temporary fix until the proposal in issue
https://github.com/kubernetes/kubernetes/issues/28630 is implemented.

Also, the new build/deployment method completely obviates this step.

[Federation] Do not build separate binaries for federation control plane components, hyperkube should be sufficient.

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Remove redundant ToJSON

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ToJSON in pkg/kubectl/resource/visitor.go#ValidateSchema is unnecessary, because "data" will be checked in schema.ValidateBytes [pkg/api/validation/schema.go] shortly.

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Extend all to more resources

Added more things from the list here:
https://github.com/kubernetes/kubernetes/blob/master/pkg/kubectl/cmd/cmd.go#L159

Note, did not add events as it did not seem useful to me. Since
this is just a list of messages generated by the system.

Related to a suggestion in issue #22337

Add instructions for running version-skewed tests

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add union registry for quota

Adds the ability to combine multiple quota registries together.  Kube needs this for other types.

@derekwaynecarr 

coreos/azure: Move into a separate repo

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Error out when any RS has more available pods then its spec replicas

Fixes #29559 (hopefully, if not the bot will open new issues for us)

@kubernetes/deployment 

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Document space shuttle style in controller/volume

Reverts #28813 and #28111.

@xiang90, I really appreciate the effort that went into your PRs (and think, in general, code simplification is a worthwhile effort), but the style in this controller was intentional to ensure that every branch is covered.  The verbosity and branchyness of this controller stores a lot of context and knowledge about how this subsystem is meant to function, so we need to put them back in.

@kubernetes/sig-storage 
cc @jsafrane @saad-ali @matchstick @thockin @childsb @rootfs

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Use the CNI bridge plugin to set hairpin mode

Following up this part of #23711:

>  I'd like to wait until containernetworking/cni#175 lands and then just pass the request through to CNI.

The code here just
 * passes the required setting down from kubenet to CNI
 * disables `DockerManager` from doing hairpin-veth, if kubenet is in use

Note to test you need a very recent version of the CNI `bridge` plugin; the one brought in by #28799 should be OK.

Also relates to https://github.com/kubernetes/kubernetes/issues/19766#issuecomment-232722864

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Add support to quota pvc storage requests

Adds support to quota cumulative `PersistentVolumeClaim` storage requests in a namespace.

Per our chat today @markturansky @abhgupta - this is not done (lacks unit testing), but is functional.

This lets quota enforcement for `PersistentVolumeClaim` to occur at creation time.  Supporting bind time enforcement would require substantial more work.  It's possible this is sufficient for many, so I am opening it up for feedback.

In the future, I suspect we may want to treat local disk in a special manner, but that would have to be a different resource altogether (i.e. `requests.disk`) or something.

Example quota:

```
apiVersion: v1
kind: ResourceQuota
metadata:
  name: quota
spec:
  hard:
    persistentvolumeclaims: "10"
    requests.storage: "40Gi"
```

/cc @kubernetes/rh-cluster-infra @deads2k 

Fixing resourcequota link

This reverts commit 9eb28319.

This reverts commit 67787cae.