Change cluster policy to availability_of_members
diff --git a/nginx/meta/heka.yml b/nginx/meta/heka.yml
index d3c4f63..0391812 100644
--- a/nginx/meta/heka.yml
+++ b/nginx/meta/heka.yml
@@ -22,7 +22,7 @@
 aggregator:
   alarm_cluster:
     nginx_check:
-      policy: majority_of_members
+      policy: availability_of_members
       alerting: enabled_with_notification
       match:
         service: nginx