[PowerVMStackers] 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: I90d8f5a3718e92cbbcc9b7ceb5f0977371a2fc30

deliverables/train/ceilometer-powervm.yaml

@@ -15,6 +15,10 @@ releases:
       - repo: openstack/ceilometer-powervm
         hash: f3008d1ee22329e0cd8e76aaf8b7b4a2a56af876
     diff-start: 8.0.0.0rc1
+  - version: train-em
+    projects:
+      - repo: openstack/ceilometer-powervm
+        hash: f3008d1ee22329e0cd8e76aaf8b7b4a2a56af876
 branches:
   - name: stable/train
     location: 9.0.0.0rc1

deliverables/train/networking-powervm.yaml

@@ -15,6 +15,10 @@ releases:
       - repo: openstack/networking-powervm
         hash: 50b81c3b2d874ecc0d81049cbcb265618534e4ba
     diff-start: 8.0.0.0rc1
+  - version: train-em
+    projects:
+      - repo: openstack/networking-powervm
+        hash: 50b81c3b2d874ecc0d81049cbcb265618534e4ba
 branches:
   - name: stable/train
     location: 9.0.0.0rc1

deliverables/train/nova-powervm.yaml

@@ -16,6 +16,10 @@ releases:
       - repo: openstack/nova-powervm
         hash: 5de7a5ebdca34ba56407c9e8cece6953278ce27f
     diff-start: 8.0.0.0rc1
+  - version: train-em
+    projects:
+      - repo: openstack/nova-powervm
+        hash: 5de7a5ebdca34ba56407c9e8cece6953278ce27f
 branches:
   - name: stable/train
     location: 9.0.0.0rc1