[manila] Transition Xena to EM

This transitions the stable/xena 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 after the transition.

Change-Id: I063faca8f727a1a85ffb2ccb141fcd4887c9553b

deliverables/xena/manila-ui.yaml

@@ -16,6 +16,10 @@ releases:
       - repo: openstack/manila-ui
         hash: 299e102ba50755d79259d6d7ccab9ee8a7043fc7
     diff-start: 5.0.0.0rc1
+  - version: xena-em
+    projects:
+      - repo: openstack/manila-ui
+        hash: 299e102ba50755d79259d6d7ccab9ee8a7043fc7
 branches:
   - name: stable/xena
     location: 6.0.0.0rc1

deliverables/xena/manila.yaml

@@ -59,6 +59,11 @@ releases:
     projects:
       - repo: openstack/manila
         hash: af9d0658aad17d4ad9e5053e5c5b07df7924bd58
+  - version: xena-em
+    projects:
+      - repo: openstack/manila
+        hash: af9d0658aad17d4ad9e5053e5c5b07df7924bd58
+
 branches:
   - name: stable/xena
     location: 13.0.0.0rc1

deliverables/xena/python-manilaclient.yaml

@@ -27,6 +27,10 @@ releases:
     projects:
       - repo: openstack/python-manilaclient
         hash: 135cdf98c3178276346d8b7764f8877111491919
+  - version: xena-em
+    projects:
+      - repo: openstack/python-manilaclient
+        hash: 135cdf98c3178276346d8b7764f8877111491919
 branches:
   - name: stable/xena
     location: 3.0.0