add queue messages to thrift definitions

src/main/thrift/packetstreamer.thrift

@@ -38,6 +38,8 @@ enum OFMessageType {
   STATS_REPLY = 17,
   BARRIER_REQUEST = 18,
   BARRIER_REPLY = 19,
+  QUEUE_GET_CONFIG_REQUEST = 20,
+  QUEUE_GET_CONFIG_REPLY = 21,
 }
 
 /**