[barbican] Transition Pike to End of Life

This transition the Pike branch to End of Life. The last patch of the
branch will be tagged with pike-eol tag. The stable/pike branch cannot
be used anymore and will be deleted if this patch merges.

This is needed as stable/pike is not actively maintained in the recent
period and thus gates are mostly broken due to job failures. Besides,
by removing these branches, infra resources will be freed up, too.

Please try to identify any zuul job, that is defined outside of the
repositories in this patch (for example in openstack-zuul-jobs, etc.)
and won't be used anymore if stable/pike is deleted, and propose a job
removal patch for them.

Please +1 if the team is ready for us to proceed with this transition,
or -1 if there are still some activity on the branch and the team wants
to continue to maintain it.

Change-Id: I9470503b9b1ac084dd6f586724e1b630ff162386

deliverables/pike/barbican.yaml

@@ -34,6 +34,10 @@ releases:
       - hash: 5e756a70861e66ee52b7b20d00fc9607ad21d133
         repo: openstack/barbican
     version: pike-em
+  - version: pike-eol
+    projects:
+      - repo: openstack/barbican
+        hash: 18c147e04424df6dcf474bce6387be9da73ecb8d
 branches:
   - location: 5.0.0.0rc1
     name: stable/pike

deliverables/pike/python-barbicanclient.yaml

@@ -32,6 +32,10 @@ releases:
       - hash: 9f6dcb0617217241ea4260bd421b19dde35160b5
         repo: openstack/python-barbicanclient
     version: pike-em
+  - version: pike-eol
+    projects:
+      - repo: openstack/python-barbicanclient
+        hash: dce6635acea945a08076b37c5071354152b6bcfa
 branches:
   - location: 4.5.2
     name: stable/pike