Add apiextensions to client's scheme

[soltysh]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
When client is interacting with kubernetes API it should have the ability to us all the possible resources. For some reason we were missing CRD's definition in scheme. This PR fills that gap.

Special notes for your reviewer:
/assign @deads2k @sttts

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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• staging/src/k8s.io/apiserver/Godeps/OWNERS
• staging/src/k8s.io/cli-runtime/Godeps/OWNERS [soltysh]
• staging/src/k8s.io/client-go/OWNERS
• staging/src/k8s.io/cloud-provider/Godeps/OWNERS
• staging/src/k8s.io/csi-api/Godeps/OWNERS
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• staging/src/k8s.io/metrics/Godeps/OWNERS
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• staging/src/k8s.io/sample-apiserver/Godeps/OWNERS
• staging/src/k8s.io/sample-cli-plugin/Godeps/OWNERS [soltysh]
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[k8s-ci-robot]

@soltysh: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pull-kubernetes-bazel-test	0e5e6ca	link	/test pull-kubernetes-bazel-test
pull-kubernetes-verify	0e5e6ca	link	/test pull-kubernetes-verify

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[caesarxuchao]

The register.go is generated. Apiextension clients are intentionally not included in client-go. See kubernetes/client-go#247 (comment).

You can use the clientset from the apiextension repo.

[soltysh]

That's fair, thanks for the info and pointers.
/close

[k8s-ci-robot]

@soltysh: Closed this PR.

In response to this:

That's fair, thanks for the info and pointers.
/close

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