Release final ceilometermiddleware for Xena

This proposed a release for ceilometermiddleware to get any final merged changes
out prior to the lib freeze for Xena going into effect.

If the team is ready to proceed, please leave a +1 to acknowledge this
release and we will process right away. If the team is working on any
final merges, leave a -1 with some detail on the status and update the
patch with the new commit hash to use when ready.

Patches with no response will be merged by Monday, August 23.

$ git log --oneline --no-merges 2.2.0..082dabb
082dabb Update master for stable/wallaby

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: I7f263b1833715f58cb714de78d1279a60e9064f6

deliverables/xena/ceilometermiddleware.yaml

@@ -6,3 +6,8 @@ team: Telemetry
 type: library
 repository-settings:
   openstack/ceilometermiddleware: {}
+releases:
+  - version: 2.3.0
+    projects:
+      - repo: openstack/ceilometermiddleware
+        hash: 082dabb1b7186f614664f69db32f80918b20d624