[swift] Transition Queens to End of Life

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

This is needed as stable/queens 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/queens 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: I02223dbd661ef993047c06121714e683f53353b9

deliverables/queens/python-swiftclient.yaml

@@ -18,6 +18,10 @@ releases:
     projects:
       - repo: openstack/python-swiftclient
         hash: 7d2acdb1b8ac1229b7a37b571c2953fe9580ced6
+  - version: queens-eol
+    projects:
+      - repo: openstack/python-swiftclient
+        hash: 7d2acdb1b8ac1229b7a37b571c2953fe9580ced6
 branches:
   - name: stable/queens
     location: 3.5.0

deliverables/queens/swift.yaml

@@ -24,6 +24,10 @@ releases:
     projects:
       - repo: openstack/swift
         hash: ecbf74fbf83ae9d46fa3d6fa882f2d9e23406f86
+  - version: queens-eol
+    projects:
+      - repo: openstack/swift
+        hash: 4349546f3f154ea759b540a3c2f01cd414931883
 cycle-highlights:
   - Added symlink objects support. Symlink objects reference one other
     object in the cluster. Read requests pass through the symlink on