Add query for heat UserKeyPairMissing bug 1360415

5 hits in 7 days, all check queue but on master and
stable/icehouse and multiple changes.

We have to fingerprint on the generic failure in
the console log for now because the more specific
failure in the heat-api log is logged at DEBUG level
so we can't hit it.

Change-Id: Ic095b53ff6ee8f18bf5d1d739065b3d74d0c450c
Related-Bug: #1360415
Merge "Add query for heat UserKeyPairMissing bug 1360415"