Move last few TestAuth tests to TokenAPITests
Move last few TestAuth tests to TokenAPITests

This commit move the last of the tests from TestAuth to TokenAPITests. The
TestAuth class is now empty but everything it was testing now living in
TokenAPITests, which is tested with more token providers.

A subsequent patch will remove TestAuth.

Change-Id: I59dc990a46bc2f99ff55efb9f3aa9a1ede07edc3

ilay09/keystone,cernops/keystone,rajalokan/keystone,ilay09/keystone,mahak/keystone,openstack/keystone,ilay09/keystone,openstack/keystone,rajalokan/keystone,cernops/keystone,mahak/keystone,openstack/keystone,mahak/keystone,rajalokan/keystone