Add metadata/service/control/cluster-admin.yml back

This patch adds cluster-admin.yml back to have ability safely cleanup
file usage in other places.

Change-Id: Ie0996104919773be65ebff90e8c5fb45941530f3
diff --git a/metadata/service/control/cluster-admin.yml b/metadata/service/control/cluster-admin.yml
new file mode 100644
index 0000000..6bf5730
--- /dev/null
+++ b/metadata/service/control/cluster-admin.yml
@@ -0,0 +1,15 @@
+# NOTE(vsaienko): this file might be safely removed in future when
+# all cluster models/reclass-system are cleanuped.
+# Use service/control/roles/cluster-admin.yml instead
+parameters:
+  kubernetes:
+    control:
+      role:
+        cluster-admin:
+          enabled: true
+          kind: ClusterRole
+          binding:
+            root-cluster-admin-binding:
+              subject:
+                admin:
+                  kind: User