Restart glance after updating policy in job

When we write out the glance policy for the multistore job, we do
so after glance has already started. After the json->yaml change,
we will decide too early in g-api lifetime that the legacy file
isn't present and thus never honor it later. So, create it and then
restart glance services.

Change-Id: Ic1c01366dbfdcfb85750b85f960b76aea934db59

Author: kk7ds

playbooks/ceph/glance-copy-policy.yaml

@@ -12,3 +12,4 @@
           # or public) to copy. This way we will be able to test copy
           # image via non-admin as well as on private images.
           echo $'{"copy_image": ""}' > /etc/glance/policy.json
+          sudo systemctl restart 'devstack@g-*'