[searchlight] 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: I67f7eb1647093cf9198ad053f1766ede3f3ec578

deliverables/train/python-searchlightclient.yaml

@@ -12,6 +12,10 @@ releases:
     projects:
       - repo: openstack/python-searchlightclient
         hash: de228e7b38a23c548394880d4e3c74fe6924b0e9
+  - version: train-em
+    projects:
+      - repo: openstack/python-searchlightclient
+        hash: de228e7b38a23c548394880d4e3c74fe6924b0e9
 branches:
   - name: stable/train
     location: 1.6.0

deliverables/train/searchlight-ui.yaml

@@ -16,6 +16,10 @@ releases:
       - repo: openstack/searchlight-ui
         hash: d22b03e2e10f8d24e09f10087367e0f3ccefece4
     diff-start: 6.0.0
+  - version: train-em
+    projects:
+      - repo: openstack/searchlight-ui
+        hash: d22b03e2e10f8d24e09f10087367e0f3ccefece4
 branches:
   - name: stable/train
     location: 7.0.0.0rc1

deliverables/train/searchlight.yaml

@@ -19,6 +19,10 @@ releases:
       - repo: openstack/searchlight
         hash: 5aeee08c44091b93b7619b48d389af4833016337
     diff-start: 6.0.0
+  - version: train-em
+    projects:
+      - repo: openstack/searchlight
+        hash: 5aeee08c44091b93b7619b48d389af4833016337
 branches:
   - name: stable/train
     location: 7.0.0.0rc1