Prepare for adding OpenStack services to Pacemaker

Prepare for adding OpenStack services to Pacemaker

We need to write config for OpenStack services on all nodes in step 3 so
that we can then create pacemaker resources in step 4. (If we wrote
config on non-bootstrap nodes in step 4 as it is currently, services on
those nodes might be started unconfigured. This is an inter-node
ordering issue that cannot be easily solved from within Puppet
manifests, hence the use of steps to enforce this ordering.)

Change-Id: Ia78ec38520bd1295872ea2690e8d3f8d6b01c46c