Add system reclass for gnocchi

Change-Id: I3f6a4fb5c48b27d6ae8259c0d9360ee1ef7a83f5
Related-Prod: https://mirantis.jira.com/browse/PROD-17727
diff --git a/gnocchi/common/coordination/redis.yml b/gnocchi/common/coordination/redis.yml
new file mode 100644
index 0000000..673d9bd
--- /dev/null
+++ b/gnocchi/common/coordination/redis.yml
@@ -0,0 +1,7 @@
+parameters:
+  _param:
+    gnocchi_coordination_url: redis://${_param:single_address}:6379
+  gnocchi:
+    common:
+      coordination_backend:
+        url: ${_param:gnocchi_coordination_url}