Pacemaker provider for Openstack services in HA

It is a common practice to make services managed by pacemaker in Linux HA clusters.
Puppet modules for Openstack should be able to ensure both standard and pacemaker providers for Openstack services as well.

In order to achieve this as a transparent solution (w/o modifications to the core puppet modules for Openstack) special wrapping classes should be created in puppet-openstack_extras. These wrappers should contain overrides for Openstack services as a Pacemaker service provider and ensure creation of corresponding Pacemaker resources as well.