Updated openstack/openstack
Project: openstack/cinder  525416f8dcd4b78201cf0211674a78444333c6a8

Replace tearDown with addCleanup - Part 3

Replace tearDown with addCleanup in some cinder unit tests.

Infra team has indicated that tearDown should not be used and should
be replaced with addCleanup in all places.

Implements blueprint replace-teardown-with-addcleanup

Change-Id: I8469ffb5c896d40f9979cd6d1f8da81be763ec14