Stop daemons before cleanup in unstack
Stop daemons before cleanup in unstack

The cleanup_ceph_embedded function nukes the ceph
conf directories, so when subsequently trying
to stop services they aren't stopped.  Next stack.sh
run will fail because daemons are still running.

Fix by stopping daemons before running cleanup.

Change-Id: I51cd58eae83171a47aa898b65240b72ea0217af9
Closes-Bug: #1534600

ajarr/devstack-plugin-ceph,openstack/devstack-plugin-ceph