Save test_auth_token_middleware from unlimited recursion

For Python 2.6, BaseAuthTokenMiddlewareTest will be
equal to AdjustedBaseAuthTokenMiddlewareTest in
BaseAuthTokenMiddlewareTest.setUp thus leading to
infinite recursion.

Also, parent's setUp was incorrectly called by
BaseAuthTokenMiddlewareTest.setUp twice: at the beginning
and at the end of the function.

Change-Id: I63fce65866ef9d8aebe9eb60f7ceb17463de0989
Fixes: bug #1130200
Work better in server env with no keyrings

We should not try loading keyrings if we dont' have to. We
certainly should not print messages if keyrings are not even
needed

Fix for LP# 1145071

Change-Id: I700a2b40620359f6f1fbe03c6a6239d162ddea61
Switch to oslo.config.

The oslo-config package has been renamed. Switch to the new
version. (should fix SmokeStack).

Change-Id: Ied8804035d748932e7763cbaa9a7e295a887f1f5
Merge "Save test_auth_token_middleware from unlimited recursion"
Merge "Work better in server env with no keyrings"
Merge "Switch to oslo.config."