Add common vars to common plays
Add common vars to common plays

We should pass in the common vars to all the common plays in
deploy-steps.j2 so that tasks will have them available. Some of these
parameter driven variables were never actually wired up, so they didn't
work to begin with (such as enable_puppet/enable_debug).

Change-Id: I830e1ae21fe3e278a5f7591065d066c0a6883a9a
Closes-Bug: #1785635

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates