Release neutron-vpnaas-dashboard and creating stable xena

If you want to wait before the branch is cut,
someone from the team can -1 the patch to have it held, or update that
patch to include another release and stable branch point.

Patches with no response will be merged by Friday September 24.

Change-Id: Ic6277f0ea58112feda441ebcd15b3ae2bc85d6bf

deliverables/xena/neutron-vpnaas-dashboard.yaml

@@ -5,3 +5,11 @@ type: horizon-plugin
 release-model: cycle-with-rc
 repository-settings:
   openstack/neutron-vpnaas-dashboard: {}
+releases:
+  - version: 5.0.0.0rc1
+    projects:
+      - repo: openstack/neutron-vpnaas-dashboard
+        hash: f0a1186b5f0328837fe4038d4dda766b4cb8987f
+branches:
+  - name: stable/xena
+    location: 5.0.0.0rc1