Updated openstack/openstack
Project: openstack/oslo-incubator  681d7fba9fe4d9139c39e10edcbd1b7c2ee06a60

Remove our custom test base class

Nothing is using the features of the test base class, so remove it and
use oslotest directly to make moving tests out of the incubator easier.

Partial-Bug: #1371700
Change-Id: Ifcde81ade9f9954c596e3b5f95c6cbcb258297ba