Minor doc change for manager and resorce_manager.

Change-Id: If24fe5bf637493918d9f1faf113f1d356801dc73
Rename TestCase.flags() to TestCase.config()

The 'flags' thing harks back to when we were using gflags, so rename the
method to config() like most other projects call it. I really should
change this in Nova someday too.

Change-Id: I07bcb6392b47cb78a2b58a5a1d663d544e7a5b63
Merge "Rename TestCase.flags() to TestCase.config()"
Merge "Minor doc change for manager and resorce_manager."