This extends the query for bug 1687044 to capture another case where we
seem to hit it. Also switch to using tags rather than wildcarded
filename path.
Change-Id: I71d741bb0d7cd4909c286f4980bef2a4dfed57d9
Related-Bug: 1687044
Cinder fails to extend volumes, breaking the new
test_volume_extend_when_volume_has_snapshot test.
Change-Id: I9cc41e453a6693d1ae7fe468beb9f824146fbeee
Related-Bug: #1687044