Example master: https://luci-milo.appspot.com/buildbot/chromeos/master-paladin/17552

Example slave that failed early (in cqsync, due to gerrit flake) the first time: https://luci-milo.appspot.com/buildbot/chromeos/beaglebone-paladin/15892

And then was retried in:
https://luci-milo.appspot.com/buildbot/chromeos/beaglebone-paladin/15893


However, the retry took 50 minutes to occur, becasue the master doesn't kick off the retry until after BinhostTest.


This potentially slows down the CQ significantly; could we run CQCompletion in parallel with binhost test, or some other way to get the retries to happen faster?