Add openstack_node_role parameter

Add openstack_node_role parameter that will specify node role
primary|secondary. This metadata will be used by formulas as a
trigger to run one-shot operations.

Change-Id: I230590bc5f9d53960c6edaf7e37c44541d9c3342
Related-Prod: PROD-21267
diff --git a/cinder/control/cluster.yml b/cinder/control/cluster.yml
index 1110c63..b5d6862 100644
--- a/cinder/control/cluster.yml
+++ b/cinder/control/cluster.yml
@@ -25,6 +25,7 @@
       default_volume_type: ""
       backend: {}
       version: ${_param:cinder_version}
+      role: ${_param:openstack_node_role}
       osapi:
         host: ${_param:cluster_local_address}
       database: