[Buildbot] #3637: Buildbot config should check force scheduler names are different

[Buildbot trac]

#3637: Buildbot config should check force scheduler names are different
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Reporter:  kayhayen  |       Owner:
    Type:  defect    |      Status:  new
Priority:  major     |   Milestone:  0.9.+
 Version:  master    |  Resolution:
Keywords:            |
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Comment (by sa2ajj):

 Yes, they have different base class and I'll need to check the code to see
 why it didn't complain earlier (this kind of problem should be shown at
 `buildbot checkconfig` step).

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Ticket URL: <http://trac.buildbot.net/ticket/3637#comment:4>
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