buildbot/buildbot — pull request #523 by tardyp (2012-09-12 16:21:58+00:00)
Title: nextSlave can choose slave according to buildrequest

There is a need for user to specify the policy for restricting
a build to a particular slave, or prioritize slave give build properties

We first try to associate a slave for each build requests
then filter out requests that do not have slaves
the remaining process is unchanged:

choose buildrequest -> merge buildrequests -> claim