[Buildbot] #2673: unify scheduler endpoints

[Buildbot trac]

#2673: unify scheduler endpoints
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Reporter:  dustin      |       Owner:
    Type:  task        |      Status:  assigned
Priority:  major       |   Milestone:  0.9.0
 Version:              |  Resolution:
Keywords:  schedulers  |
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Comment (by dustin):

 I'd like to fix this before 0.9.0 is released, otherwise we'll need to
 keep backward-compatibility for `/forceschedulers`

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Ticket URL: <http://trac.buildbot.net/ticket/2673#comment:7>
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