cluster setup that works with el7
Merge pull request #25 from cwolferh/adapt_to_new_pacemaker

cluster setup that works with el7
Update to support managing services with systemd.

RHEL 7 uses systemd, so that support is added with this patch.  Also, introduce a
wrapper 'pacemaker::resource::service' that will call the right type of service
without specification from the caller.