puppet-pacemaker refs: back to upstream

Our PR has been merged:
https://github.com/radez/puppet-pacemaker/commit/56bbb3580bb7fa62bf57c2ed7a30b938e42b8cc3

Let's back to this commit and continue to follow upstream module.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge pull request #597 from enovance/pacemaker-refs

puppet-pacemaker refs: back to upstream