Keep monit from also restarting rabbitmq

There's still a race condition with chef/monit fighting over a slow
restart and who's in charge of ensuring rabbitmq is running. Rather than
removing monitoring entirely, we'll turn the restarts by monit into
noops but should still receive notifications.

- Change start/stop commands for monit monitoring of rabbitmq

(cherry picked from commit 5cb9b0229b4f66e3f2424ff1a6d0cb99005cbc64)