Allow passing tags to update/upgrade Ansible workflow
Allow passing tags to update/upgrade Ansible workflow

We may use this with external update/upgrade commands to limit the
operation to a particular service (e.g. in envs with both Ceph and
OpenShift, upgrade them one at a time).

Change-Id: I982032a0eadfbfb7f1eadee9cae26c8cd5fcdbba

openstack/tripleo-common,openstack/tripleo-common