[Buildbot] #3243: Trac hook @ GitHub shows an error

[Buildbot trac]

#3243: Trac hook @ GitHub shows an error
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Reporter:  sa2ajj           |      Owner:
    Type:  support-request  |     Status:  new
Priority:  major            |  Milestone:  sys - on-bb-infra
 Version:                   |   Keywords:
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 It says "Last delivery was not successful. Invalid HTTP response: 500"

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Ticket URL: <http://trac.buildbot.net/ticket/3243>
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Buildbot: build/test automation