Fixed alarm definitions

Change-Id: Ifb4abc4642b90a7895820eaa6516b2af4072413a
diff --git a/keystone/meta/heka.yml b/keystone/meta/heka.yml
index f17333e..d046938 100644
--- a/keystone/meta/heka.yml
+++ b/keystone/meta/heka.yml
@@ -105,8 +105,9 @@
 aggregator:
   alarm_cluster:
     keystone_response_time:
-      policy: highest_severity
+      policy: status_of_members
       alerting: enabled
+      group_by: hostname
       match:
         service: keystone-response-time
       members:
@@ -115,7 +116,7 @@
         service: keystone
         nagios_host: 01-service-clusters
     keystone_logs:
-      policy: highest_severity
+      policy: status_of_members
       alerting: enabled
       group_by: hostname
       match: