[kuryr] 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: I6c615f7d970397ca297b102f6afe9bb961958ed6

deliverables/ussuri/kuryr-kubernetes.yaml

@@ -30,6 +30,10 @@ releases:
     projects:
       - repo: openstack/kuryr-kubernetes
         hash: 50d6fd1e39bdad8f3e39b6ef92b1f3d6061cb84c
+  - version: ussuri-em
+    projects:
+      - repo: openstack/kuryr-kubernetes
+        hash: 50d6fd1e39bdad8f3e39b6ef92b1f3d6061cb84c
 branches:
   - name: stable/ussuri
     location: 2.0.0.0rc1

deliverables/ussuri/kuryr-libnetwork.yaml

@@ -19,6 +19,10 @@ releases:
     projects:
       - repo: openstack/kuryr-libnetwork
         hash: b2b1a36d0db096a5ccfe4084e291e2b5004f8bb7
+  - version: ussuri-em
+    projects:
+      - repo: openstack/kuryr-libnetwork
+        hash: b2b1a36d0db096a5ccfe4084e291e2b5004f8bb7
 branches:
   - name: stable/ussuri
     location: 5.0.0.0rc1

deliverables/ussuri/kuryr.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/kuryr
         hash: dbcca8aa716677c273ec898bc6bc5dc08a17644f
+  - version: ussuri-em
+    projects:
+      - repo: openstack/kuryr
+        hash: dbcca8aa716677c273ec898bc6bc5dc08a17644f
 branches:
   - location: 2.0.0
     name: stable/ussuri