bind for federated flush messages (#170)

kamailio/registrar-role.cfg

@@ -325,7 +325,7 @@ route[REGISTRAR_BINDINGS]
     
     #!ifndef REGISTRAR_CUSTOM_BINDINGS    
 
-    $var(payload) = "{ 'exchange' : 'registrar' , 'type' : 'topic', 'queue' : 'registrar-flush-MY_HOSTNAME', 'routing' : 'registration.flush.*', 'no_ack' : 1, 'wait_for_consumer_ack' : 0 }";
+    $var(payload) = "{ 'exchange' : 'registrar' , 'type' : 'topic', 'queue' : 'registrar-flush-MY_HOSTNAME', 'routing' : 'registration.flush.*', 'federate' : 1, 'no_ack' : 1, 'wait_for_consumer_ack' : 0 }";
     kazoo_subscribe("$var(payload)");
     
     #!endif