Restore authorization to RBAC proxy test
Restore authorization to RBAC proxy test

This test was removed in b93335cf0e36985a864db01e860858bad0645dfa as
part of the removal of all oapi related code.  The functionality
this test checks is not related to oapi (even though the original
version of the test explicitly used the oapi endpoints).  The
updated test does not rely on any internal clients.

Signed-off-by: Monis Khan <19f7b2d00144930eab99c4cfd2a8d2d2a225ef67@redhat.com>

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