[ONOS-5623] Enhance map server to handle Info-Request control msg

Change-Id: If5f68041fbef786e912fc17e33a0e296df73cd3d
diff --git a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispNoAddress.java b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispNoAddress.java
index a8894eb..a36c386 100644
--- a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispNoAddress.java
+++ b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispNoAddress.java
@@ -49,7 +49,7 @@
 
         @Override
         public void writeTo(ByteBuf byteBuf, LispNoAddress address) throws LispWriterException {
-
+            // since there is nothing to write to channel, we just leave it empty
         }
     }
 }