[Buildbot] #3649: GerritChangeFilter doesn't trigger a builder if a push is done without a gerrit review

[Buildbot trac]

#3649: GerritChangeFilter doesn't trigger a builder if a push is done without a
gerrit review
--------------------+-----------------------
Reporter:  RockHed  |      Owner:
    Type:  defect   |     Status:  new
Priority:  major    |  Milestone:  undecided
 Version:  0.8.12   |   Keywords:  Gerrit
--------------------+-----------------------
 I'm on 0.8.14 and If I go through the usual gerrit flow of a push
 for/branch & it's then merged into said branch, buildbot triggers a build
 just fine. However, if I push it directly into said branch, even though
 buildbot sees the change, no build is triggerred.
 my AnyBranchScheduler is set up as:
 change_filter=GerritChangeFilter(project=repo, branch="master", eventtype
 =["ref-updated", "change-merged"])

 and the below change was added that had no effect:
 2016-11-29 22:45:49-0800 [-] added change Change(revision=u'e69d....',
 branch=u'master', comments=u'Gerrit: patchset(s) merged.',
 when=1480488349, category=u'ref-updated',

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Ticket URL: <http://trac.buildbot.net/ticket/3649>
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