Refactor the logic on collecting OpenFlow message statistics

Change-Id: I34c209c0ca90cb094ed5f82c96a8a43d3519b807
diff --git a/protocols/openflow/api/src/test/java/org/onosproject/openflow/controller/OpenflowControllerAdapter.java b/protocols/openflow/api/src/test/java/org/onosproject/openflow/controller/OpenflowControllerAdapter.java
index 8900d9d..20e2aed 100644
--- a/protocols/openflow/api/src/test/java/org/onosproject/openflow/controller/OpenflowControllerAdapter.java
+++ b/protocols/openflow/api/src/test/java/org/onosproject/openflow/controller/OpenflowControllerAdapter.java
@@ -52,10 +52,6 @@
     }
 
     @Override
-    public void monitorAllEvents(boolean monitor) {
-    }
-
-    @Override
     public void addListener(OpenFlowSwitchListener listener) {
     }
 
@@ -64,6 +60,16 @@
     }
 
     @Override
+    public void addMessageListener(OpenFlowMessageListener listener) {
+
+    }
+
+    @Override
+    public void removeMessageListener(OpenFlowMessageListener listener) {
+
+    }
+
+    @Override
     public void addPacketListener(int priority, PacketListener listener) {
     }