Updated openstack/openstack
Project: openstack/glance  2c4bd695652a628758eb56cb36394940a855d696
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: Ia8d38f73c159c7ef943a8f6cfe72b945cc493947
Closes-bug: #1268480