Remove query for nova MessagingTimeout unit test bug 1311778

We've had several fixes go in for this bug and in the last
7 days in logstash it's only hitting on the master branch
and when looking at the logs for the new failures, there are
more specific test failures that we should be fingerprinting
on rather than this collateral failure which is masking new
bugs, so let's close the bug and delete the query and open
new bugs for new more-specific test failures.

Change-Id: I542cf6df2a8f4a8357b03acda2d74fe55d0ab416
Related-Bug: #1311778