Updated openstack/openstack
Project: openstack/keystone  495025619f51551f8520768e4e934bd100d18c0b
null
Change assertTrue(isinstance()) by optimal assert

Some of tests use different method of assertTrue(isinstance(A, B)) or
assertEqual(type(A), B). The correct way is to use assertIsInstance(A,
B) provided by testtools.

Change-Id: I8426ee1f6387602660f2d768883d18ab2f04c6f0
Closes-bug: #1268480