[tacker] Transition Ocata to End of Life

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

This is needed as stable/ocata is not actively maintained in the recent
period and thus gate is broken due to job failures. 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/ocata 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: Ibd3734c6f31e67b631cbb494453e558173d3c2a3

deliverables/ocata/python-tackerclient.yaml

@@ -21,5 +21,9 @@ releases:
       - hash: 9a5588d1661406800db57eb71f0d39cf65d030e6
         repo: openstack/python-tackerclient
     version: ocata-em
+  - version: ocata-eol
+    projects:
+      - repo: openstack/python-tackerclient
+        hash: 7c786b3ee344234cc3cc8404f289958cc244ae81
 repository-settings:
   openstack/python-tackerclient: {}

deliverables/ocata/tacker-horizon.yaml

@@ -23,6 +23,10 @@ releases:
       - hash: 1d228935bac15db186a08f3ee1a62e06b6791fee
         repo: openstack/tacker-horizon
     version: ocata-em
+  - version: ocata-eol
+    projects:
+      - repo: openstack/tacker-horizon
+        hash: 7fb2fe09c1a92c93a6c3f8c7e59927400f73f2f9
 repository-settings:
   openstack/tacker-horizon: {}
 # Retriggering ocata-em tagging

deliverables/ocata/tacker.yaml

@@ -23,6 +23,10 @@ releases:
       - hash: a4024984baee1fd30fb125dab53763d62388a550
         repo: openstack/tacker
     version: ocata-em
+  - version: ocata-eol
+    projects:
+      - repo: openstack/tacker
+        hash: 3bfe0c24b5aa1c99a63327be5874ed17d6cedb19
 repository-settings:
   openstack/tacker: {}
 # Retriggering ocata-em tagging