Restrict use of become to minimum necessary for Ceph deployment
Restrict use of become to minimum necessary for Ceph deployment

We should avoid use of become: true where unnecessary because
additional files might get created with the wrong permissions.

Change-Id: I4dc71fd23134a9e4a5b2b6e93d2cf45735e71711
Related-Bug: 1813832

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