[Buildbot] #3227: MailNotifier's default email contains a wrong link to the build

[Buildbot trac]

#3227: MailNotifier's default email contains a wrong link to the build
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Reporter:  riziero  |      Owner:
    Type:  defect   |     Status:  new
Priority:  major    |  Milestone:  0.9.0
 Version:  master   |   Keywords:
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 Instead of being

 http://IP:port/#/builders/X/builds/Y

 the link sent with the email looks like:

 http://IP:port/#/builders/name_of_builder_with_id_X/builds/Y-1

 The culprit should be _defaultMessageURLs(master_status, build) in
 https://github.com/buildbot/buildbot/blob/master/master/buildbot/status/mail.py

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Ticket URL: <http://trac.buildbot.net/ticket/3227>
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