bump(github.com/GoogleCloudPlatform/kubernetes): 97cb1fa2df8b57be5ceaae290e02872f291b7b7e
Kube rebase (1/3)
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Merge pull request #441 from smarterclayton/mergefive

Merged by openshift-bot
Make auth interfaces more flexible

Allow AuthenticationNeeded/GrantNeeded interfaces to decide whether to handle the request, or let the default error response be written by the oauth server