Changed the how to relay proxy message within cluster

*changed the commnunication way to 'unicast' from 'sendAndReceived'

Change-Id: I0207c074fd2ab7b8378d9b4ce0cf877fc9aeab29
diff --git a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/DefaultNetconfProxyMessage.java b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/DefaultNetconfProxyMessage.java
index 1a57d4d..da9db37 100644
--- a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/DefaultNetconfProxyMessage.java
+++ b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/DefaultNetconfProxyMessage.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-present Open Networking Foundation
+ * Copyright 2019-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.onosproject.netconf.ctl.impl;
 
 import com.google.common.collect.ImmutableList;
+import org.onosproject.cluster.NodeId;
 import org.onosproject.net.DeviceId;
 import org.onosproject.netconf.NetconfProxyMessage;
 
@@ -30,21 +31,26 @@
     private final SubjectType subjectType;
     private final DeviceId deviceId;
     private final List<String> arguments;
+    private final NodeId senderId;
 
     /**
      * Create new NetconfProxyMessage with provided informations.
      * @param subType Message subject type.
      * @param devId Device information that recieve message.
      * @param args Messages arguments.
+     * @param nodeId nodeId of sender
      */
     public DefaultNetconfProxyMessage(SubjectType subType,
                                       DeviceId devId,
-                                      List<String> args) {
+                                      List<String> args,
+                                      NodeId nodeId) {
         subjectType = subType;
         deviceId = devId;
         arguments = args;
+        senderId = nodeId;
     }
 
+
     @Override
     public SubjectType subjectType() {
         return subjectType;
@@ -59,4 +65,9 @@
     public List<String> arguments() {
         return ImmutableList.copyOf(arguments);
     }
+
+    @Override
+    public NodeId senderId() {
+        return senderId;
+    }
 }