This includes two new labels:
* manila_enabled: default to False, weither the provisioner should be
configured
* manila_version: matches the tag of the provisioner image to be used

magnum/drivers/heat/k8s_fedora_template_def.py
magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml

Change-Id: I72f8dec37cf9286c0119769a52a992e5f66c5f20