Add classes for Gnocchi archive policies implementation

Change-Id: I77d5334075d60c34611ed920ee538fbe3990da13
Related-Prod: https://mirantis.jira.com/browse/PROD-20813
Depends-On: I7341dfb26a39275e1a9b55f7a49fd2ace9584612
diff --git a/gnocchi/client/init.yml b/gnocchi/client/init.yml
new file mode 100644
index 0000000..2fcea87
--- /dev/null
+++ b/gnocchi/client/init.yml
@@ -0,0 +1,2 @@
+classes:
+- service.gnocchi.client