Pin puppet-pacemaker to stable/0.6.x branch
Pin puppet-pacemaker to stable/0.6.x branch

We are releasing puppet-pacemaker 0.6.0 and branching stable/0.6.x for Newton
and Ocata: https://review.openstack.org/467636

Update rdo.yaml to use the branch instead of previous commits.

Change-Id: I3a24d898a7884a8aa18e71e49a43ebabe2489d87

redhat-openstack/rdoinfo,javierpena/rdoinfo