Merge "Add release note for CloudKitty configuration fixes"

releasenotes/notes/cloudkitty-removed-config-options-6b656fb8bfa5431d.yaml

+---
+fixes:
+  - |
+    Fixes the default CloudKitty configuration, which included the
+    ``gnocchi_collector`` and ``keystone_fetcher`` options that were deprecated
+    in Stein and removed in Train. See `bug 1876985
+    <https://bugs.launchpad.net/kolla-ansible/+bug/1876985>`__ for details.