[designate] 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: I2ae62d363578a110fa6be1539b7a40c25403fece

deliverables/train/designate-dashboard.yaml

@@ -20,6 +20,10 @@ releases:
     projects:
       - repo: openstack/designate-dashboard
         hash: 51a44589c2f59fca73ed8b1f3933c5d6cffae50c
+  - version: train-em
+    projects:
+      - repo: openstack/designate-dashboard
+        hash: 51a44589c2f59fca73ed8b1f3933c5d6cffae50c
 branches:
   - name: stable/train
     location: 9.0.0.0rc1

deliverables/train/designate.yaml

@@ -25,6 +25,10 @@ releases:
     projects:
       - repo: openstack/designate
         hash: f9035b251e7de50d398d1a240923862237164f1b
+  - version: train-em
+    projects:
+      - repo: openstack/designate
+        hash: f9035b251e7de50d398d1a240923862237164f1b
 cycle-highlights:
   - Removal of old deprecated code like Pool Manager and old Power DNS
     drivers which ensures less complexity for operators. (95% of all

deliverables/train/python-designateclient.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/python-designateclient
         hash: 093d8d7170cbf6ef8c7a7c0ff2a4dcd7ecd6361b
+  - version: train-em
+    projects:
+      - repo: openstack/python-designateclient
+        hash: 093d8d7170cbf6ef8c7a7c0ff2a4dcd7ecd6361b
 branches:
   - name: stable/train
     location: 3.0.0