Release glance_store 0.22.0

This is a knock on late release to incorporate the requirements change
for os-brick.

An FFE from the release team was requested in [1].  I'm working on the
theory that as os-brick 1.15.2 was released and the minimum bump in [2]
was approved by ttx we're good to take this.

[1] http://lists.openstack.org/pipermail/openstack-dev/2017-July/120358.html
[2] https://review.openstack.org/#/c/489376/

Change-Id: I684b3fd04777da4e996d932d6821aad16ed865d1

deliverables/pike/glance-store.yaml

@@ -9,6 +9,10 @@ releases:
     projects:
       - repo: openstack/glance_store
         hash: 599b9b8491ab22ea238b271c518011f45ead26c2
+  - version: 0.22.0
+    projects:
+      - repo: openstack/glance_store
+        hash: 49c915f498fc8d91c98fcf4e07ceecdcf167fc5a
 branches:
   - name: stable/pike
     location: 0.21.0