nailgun agent must not change mcollective config after provisioning
cloudinit is responsible for that.
It may happen that nailgun agent may be started by cron earlier than
it is reconfigured and started by cloudinit. This leads to the
situation when cloudinit reconfigures mcollective and issues start
which doesn't do anything since it is already started by nailgun agent.
Finally, mcollective is left started with incorrect default
configuration.
Change-Id: I0c6f3720943ad21e22899368832e451bc906b098
Closes-Bug: #1455489
50bcd8448e