Install mon servers in parallel.
Install mon servers in parallel.

The ceph-ansible roles handle restarting services in serial via a
script, so we shouldn't need to run this in serial.

Change-Id: Ia2f2694abe02af282e7a98fcc40410b0510cc1cd
Closes-Bug: #1741085

bunchc/openstack-ansible,stackforge/os-ansible-deployment,bunchc/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible