Add query for keystone bug 1373680

We had a different bug open for this at one
point but I can't find that anymore, so opened
a new one as we're hitting this in the gate.

2 hits in 10 days, check and gate, all failures.

We probably deleted the old query and closed
the bug because we thought the issue was gone.

Change-Id: Ie37ce6f36b01f1c9fe27eecfc5c604e4a0f69943
Related-Bug: #1373680