[Buildbot] #3066: buildbot.test.integration.test_master.RunMaster.test_master1 become flaky

[Buildbot trac]

#3066: buildbot.test.integration.test_master.RunMaster.test_master1 become flaky
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Reporter:  Ben       |       Owner:
    Type:  defect    |      Status:  new
Priority:  critical  |   Milestone:  0.9.0
 Version:  master    |  Resolution:
Keywords:            |
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Comment (by dustin):

 I can trigger this earlier by heavily loading CPU on my system.  It looks
 like the problem is that `BuildslaveManager` isn't an `AsyncMultiService`.

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Ticket URL: <http://trac.buildbot.net/ticket/3066#comment:13>
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