Removes the role heat param from all templates. Instead and only for
k8s templates adds the master_role and worker_role params. The new
worker_only condition should be true for all roles except for master.
Finally, adds the missing is_cluster_stack param to all templates.
Change-Id: Ie0799373fe492c2e0a0cad903ed6e8c93e6266b5
44631afbbf