RemoteShellCommand: add parameters to override user the command is run as
sort force schedulers by name
fix hgpoller keep inserting the change set
changed function named to_int -> addOid
fix failing tests - some tests were expecting an int value

some tests were expecting an int value and string was return
Merge branch 'pull675'
Merge branch 'uid_gid' of git://github.com/andrewjcg/buildbot