[Buildbot] #3329: slave protocol Listener class tries to set `self.master`

[Buildbot trac]

#3329: slave protocol Listener class tries to set `self.master`
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Reporter:  dustin    |       Owner:  dustin
    Type:  defect    |      Status:  assigned
Priority:  critical  |   Milestone:  0.9.0b2
 Version:  master    |  Resolution:
Keywords:            |
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Comment (by dustin):

 To be explicit, the options are:

  * fix all `self.master = master`, each of which requires addressing (1)
 and (2), including in tests (a lot of work)
  * remove the `master` property from !AsyncService and just set
 `self.master` explicitly in every class
  * Modify `setup.py` to require Twisted <= 15.0.0 until one of the above
 is done

 Noting that the last option would preclude Python-3, since Twisted <=
 15.0.0 is not Python-3 compatible.

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Ticket URL: <http://trac.buildbot.net/ticket/3329#comment:5>
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