[Buildbot] #3522: Gerrit Reporter summaryCB does not accept deferreds

[Buildbot trac]

#3522: Gerrit Reporter summaryCB does not accept deferreds
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Reporter:  ryansydnor  |       Owner:
    Type:  defect      |      Status:  new
Priority:  minor       |   Milestone:  undecided
 Version:  master      |  Resolution:
Keywords:              |
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Comment (by tardyp):

 yield the call to self.summaryCB will not break compatibility.

 yield will also work if the function does not return a deferred.
 So solution 1 is the way to go!

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Ticket URL: <http://trac.buildbot.net/ticket/3522#comment:1>
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