[senlin] create pike-em tag against final releases

This is a procedural review to transition pike into extended maintenance by
creating the pike-em tag

It's possible that the release isn't needed (for example if there are no code
changes sine the previous release, sadly that's non-trivial to detect en masse.

If you are the PTL or release liaison for this team please +1 this review
if it is ready or -1 and take over the review to correct mistakes.

Change-Id: I0a70fe411552ed28ae1c7b9bc9eec0ef46bf602f

deliverables/pike/senlin-dashboard.yaml

@@ -16,6 +16,10 @@ releases:
       - hash: 8f151eae8a57d69b0a8baf21be0f4094203c6795
         repo: openstack/senlin-dashboard
     version: 0.7.1
+  - projects:
+      - hash: 8f151eae8a57d69b0a8baf21be0f4094203c6795
+        repo: openstack/senlin-dashboard
+    version: pike-em
 release-notes: https://docs.openstack.org/releasenotes/senlin-dashboard/pike.html
 repository-settings:
   openstack/senlin-dashboard: {}