[Buildbot] #3081: buildbot.test.integration.test_try_client is flaky

[Buildbot trac]

#3081: buildbot.test.integration.test_try_client is flaky
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Reporter:  Ben     |       Owner:  dustin
    Type:  defect  |      Status:  assigned
Priority:  major   |   Milestone:  0.9.0
 Version:  master  |  Resolution:
Keywords:          |
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Comment (by dustin):

 One of those `_activityPollCall.start` calls is returning right after it
 starts, with the rest delayed until stopping the service.  Looking in the
 source, this occurs during the activity poll, if the service is activated.

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Ticket URL: <http://trac.buildbot.net/ticket/3081#comment:12>
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Buildbot: build/test automation