[vitrage] Transition Rocky to EM

This transition the rocky branch to extended maintenance.
Changes for bugfixes and things the team deems important are
still encouraged, but there will no longer be official releases
off of the branch.

Please +1 if the team is ready for us to proceed with this
transition, or -1 if there are any final backports currently in
flight that we should wait for. For the latter case, please
update the patch with the new commit hash after doing a final
release to get those changes out so we know to proceed with the
transition.

Change-Id: I5f8ca373af9d9fa539713fbf00e50ccc224506e3

deliverables/rocky/python-vitrageclient.yaml

@@ -18,6 +18,10 @@ releases:
     projects:
       - repo: openstack/python-vitrageclient
         hash: 76e7198fe9d9b7564fead345587aab9adfc043b6
+  - version: rocky-em
+    projects:
+      - repo: openstack/python-vitrageclient
+        hash: 76e7198fe9d9b7564fead345587aab9adfc043b6
 cycle-highlights:
   - New API for alarm history
 release-notes: https://docs.openstack.org/releasenotes/python-vitrageclient/rocky.html

deliverables/rocky/vitrage-dashboard.yaml

@@ -25,6 +25,10 @@ releases:
     projects:
       - repo: openstack/vitrage-dashboard
         hash: f265f1549bd00131c436d913571b515467b01f2d
+  - version: rocky-em
+    projects:
+      - repo: openstack/vitrage-dashboard
+        hash: f265f1549bd00131c436d913571b515467b01f2d
 cycle-highlights:
   - New UI for alarm history
 release-notes: https://docs.openstack.org/releasenotes/vitrage-dashboard/rocky.html

deliverables/rocky/vitrage.yaml

@@ -25,6 +25,10 @@ releases:
     projects:
       - repo: openstack/vitrage
         hash: 37a393c85bd689fbc689213d9c1b9d1462798104
+  - version: rocky-em
+    projects:
+      - repo: openstack/vitrage
+        hash: 37a393c85bd689fbc689213d9c1b9d1462798104
 cycle-highlights:
   - Fast-failover of vitrage-graph for better High-Availability support
   - New Kubernetes datasource, for Kubernetes cluster as a workload