[tricircle] Transition Stein to EM

This transition the stein 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: I2364af68ddc3729ce98d2689d7ab4939c0547006

deliverables/stein/python-tricircleclient.yaml

@@ -12,6 +12,10 @@ releases:
         repo: openstack/python-tricircleclient
         tarball-base: tricircleclient
     version: 0.5.0
+  - version: stein-em
+    projects:
+      - repo: openstack/python-tricircleclient
+        hash: d7dc4eedb2116ff32410c8a501ffd85950ef6d64
 branches:
   - location: 0.5.0
     name: stable/stein

deliverables/stein/tricircle.yaml

@@ -9,6 +9,10 @@ releases:
     projects:
       - repo: openstack/tricircle
         hash: 4f27abf4d141fe47928f89516f22dea14f3e446c
+  - version: stein-em
+    projects:
+      - repo: openstack/tricircle
+        hash: 4f27abf4d141fe47928f89516f22dea14f3e446c
 branches:
   - name: stable/stein
     location: 6.0.0