[freezer] Transition Train to EM

This transition the train 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: I636e9014d98c0e46d20545ad8c4ae8130f74406d

deliverables/train/freezer-web-ui.yaml

@@ -11,6 +11,10 @@ releases:
     projects:
       - repo: openstack/freezer-web-ui
         hash: 1f06dacd90467b1dd84a5a277ca674febbd63f50
+  - version: train-em
+    projects:
+      - repo: openstack/freezer-web-ui
+        hash: 1f06dacd90467b1dd84a5a277ca674febbd63f50
 branches:
   - name: stable/train
     location: 7.2.0

deliverables/train/freezer.yaml

@@ -16,6 +16,14 @@ releases:
         hash: c57a206eb8347e0b3c02455e32ddf378e29e0bfe
       - repo: openstack/freezer-dr
         hash: 9bd3eab987255b43e600bdd2dae649678c755d69
+  - version: train-em
+    projects:
+      - repo: openstack/freezer
+        hash: 65a985e8c38290303f963f9e5494fa2ee796d4c7
+      - repo: openstack/freezer-api
+        hash: c57a206eb8347e0b3c02455e32ddf378e29e0bfe
+      - repo: openstack/freezer-dr
+        hash: 9bd3eab987255b43e600bdd2dae649678c755d69
 branches:
   - name: stable/train
     location: 7.2.0

deliverables/train/python-freezerclient.yaml

@@ -11,6 +11,10 @@ releases:
     projects:
       - repo: openstack/python-freezerclient
         hash: db341f8d0ad37d0187dbfc3fe78b32487117228f
+  - version: train-em
+    projects:
+      - repo: openstack/python-freezerclient
+        hash: db341f8d0ad37d0187dbfc3fe78b32487117228f
 branches:
   - name: stable/train
     location: 2.2.0