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Automatic merge from submit-queue Support storageclass storage updates to v1 **What this PR does / why we need it**: enable cluster administrators to update storageclasses stored in etcd from storage.k8s.io/v1beta1 to storage.k8s.io/v1. **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: I had a hard time getting the test to work with how it was handling KUBE_API_VERSIONS and RUNTIME_CONFIG. I would appreciate some extra review attention there. Also, I had to hack in a `cluster-scoped` "namespace" to get the verification portions of the test script to work. I'm definitely open to ideas for how to improve that if needed. **Release note**: ```release-note Support updating storageclasses in etcd to storage.k8s.io/v1. You must do this prior to upgrading to 1.8. ``` cc @kubernetes/sig-storage-pr-reviews @kubernetes/sig-api-machinery-pr-reviews @jsafrane @deads2k @saad-ali @enj