Add query for a rescue related failure

The 'Failed to terminate process' as part of an exception
frequently appears in the n-cpu logs (~50/week), but not always
causes failures on the tempest side.

The query limited to the pattern which always caused failure,
it has just 2 hit this week.

Change-Id: I80d4883a3b645b6d8c7227b6c14c1279b2171c4b
Related-Bug: #1353939
Merge "Add query for a rescue related failure"