Instead of just listing which bugs were seen in an entire gerrit event
(multiple jenkins/zuul jobs), list which bugs were seen in which job.
If one of the jobs has an unrecognized error don't display the comment
about running recheck, just list which bugs were seen on which jobs (and
which has an unrecognized error)
Change-Id: I55b2eb8f0efe43ab22540294150d4bc9f5885510