Automatic merge from submit-queue

Adding test-federation-cmd.sh to test kubectl with federation apiserver

There are 2 parts to the PR:
* Adding ability to run kubectl tests for a subset of resources.
* Adding test-federation-cmd.sh that runs kubectl tests for resources that are supported by federation-apiserver.

cc @kubernetes/sig-federation @kubernetes/sig-api-machinery 

```release-note
Adding kubectl tests for federation
```