Add query for nova unit test bug 1291620

We can't fingerprint on just the test case name since that would overlap
with bug 1266611 which we have another query for, and in that bug it's a
different exception case.

Related-Bug: #1291620

Change-Id: I3bcaa06296d031da0de1db5b31ee29874dcbc19f
Merge "Add query for nova unit test bug 1291620"