Use policy status_of_members for node clusters

https://github.com/Mirantis/mk-lab-salt-model/pull/187
diff --git a/heka/alarm/openstack_control.yml b/heka/alarm/openstack_control.yml
index 7dcb331..e94db48 100644
--- a/heka/alarm/openstack_control.yml
+++ b/heka/alarm/openstack_control.yml
@@ -85,7 +85,7 @@
     aggregator:
       alarm_cluster:
         control_nodes:
-          policy: majority_of_members
+          policy: status_of_members
           alerting: enabled_with_notification
           group_by: hostname
           match: