[keystone] Transition Ussuri to EM

This transition the ussuri 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: I09bf449c6de0ea2acd79fc7f100600f729e31aac

deliverables/ussuri/keystone.yaml

@@ -42,6 +42,10 @@ releases:
     projects:
       - repo: openstack/keystone
         hash: 2cf2912fd4d23bd8515313eafc77c6df92c68b81
+  - version: ussuri-em
+    projects:
+      - repo: openstack/keystone
+        hash: 2cf2912fd4d23bd8515313eafc77c6df92c68b81
 branches:
   - name: stable/ussuri
     location: 17.0.0.0rc1

deliverables/ussuri/keystoneauth.yaml

@@ -21,6 +21,10 @@ releases:
     projects:
       - repo: openstack/keystoneauth
         hash: d8d0fd49d059957838fef833baefd3a3423d9938
+  - version: ussuri-em
+    projects:
+      - repo: openstack/keystoneauth
+        hash: d8d0fd49d059957838fef833baefd3a3423d9938
 branches:
   - name: stable/ussuri
     location: 4.0.0

deliverables/ussuri/keystonemiddleware.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/keystonemiddleware
         hash: 2ff74894c81cdc266c97d3aa99b055193cc3ee2b
+  - version: ussuri-em
+    projects:
+      - repo: openstack/keystonemiddleware
+        hash: 2ff74894c81cdc266c97d3aa99b055193cc3ee2b
 branches:
   - name: stable/ussuri
     location: 9.0.0

deliverables/ussuri/pycadf.yaml

@@ -11,6 +11,10 @@ releases:
     projects:
       - repo: openstack/pycadf
         hash: 91073f4ea1d919604dc161a231b21de006a2a0cd
+  - version: ussuri-em
+    projects:
+      - repo: openstack/pycadf
+        hash: 91073f4ea1d919604dc161a231b21de006a2a0cd
 branches:
   - name: stable/ussuri
     location: 3.0.0

deliverables/ussuri/python-keystoneclient.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/python-keystoneclient
         hash: b58ebe2b7f6166bd42469d1512bdcaf2fd216b4a
+  - version: ussuri-em
+    projects:
+      - repo: openstack/python-keystoneclient
+        hash: b58ebe2b7f6166bd42469d1512bdcaf2fd216b4a
 branches:
   - name: stable/ussuri
     location: 4.0.0