Add query for Tempest volume test bug 1313970

The test itself is racy since it's comparing volumes on created_at
timestamp which is run in parallel and they can sometimes be created at
the same second, so the comparison/sort fails.

Related-Bug: #1313970

Change-Id: Iefc5a66325bb57e36ac9c8e7e0adc9c9e1b0075d