Provision test users and token explicitly for extended tests

[brenton]

Currently the tests rely on AllowAll auth and request a token:
https://github.com/openshift/origin/blob/master/test/util/client.go#L67

Talking with Jordan in #11254 he mentioned it would be best to provision the user and api token explicitly. That should allow tests to run regardless of auth config.

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/lifecycle stale

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/lifecycle rotten
/remove-lifecycle stale

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