[2.4] Can't compose a machine on a kvm pod due to "compose() got an unexpected keyword argument 'skip_commissioning'"

[Andres Rodriguez]

==> regiond.log <==
2017-12-15 20:36:26 maasserver.websockets.protocol: [critical] Error on request (119) pod.compose: compose() got an unexpected keyword argument 'skip_commissioning'

Traceback (most recent call last):
  File "/snap/maas/x3/usr/lib/python3/dist-packages/twisted/internet/base.py", line 1203, in mainLoop
    self.runUntilCurrent()
  File "/snap/maas/x3/usr/lib/python3/dist-packages/twisted/internet/base.py", line 798, in runUntilCurrent
    f(*a, **kw)
  File "/snap/maas/x3/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 393, in callback
    self._startRunCallbacks(result)
  File "/snap/maas/x3/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 501, in _startRunCallbacks
    self._runCallbacks()
--- <exception caught here> ---
  File "/snap/maas/x3/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 588, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/snap/maas/x3/lib/python3.5/site-packages/maasserver/websockets/handlers/pod.py", line 262, in compose
    skip_commissioning=params.get('skip_commissioning', False))
builtins.TypeError: compose() got an unexpected keyword argument 'skip_commissioning'