[ONOS-4718] Add skeleton code for de-serializing LISP ctrl messages

Change-Id: I52f7905538e5832e5282812df869b8158ce23334
diff --git a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/DefaultLispMapReply.java b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/DefaultLispMapReply.java
index 760d1ad..ee42dd1 100644
--- a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/DefaultLispMapReply.java
+++ b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/DefaultLispMapReply.java
@@ -17,6 +17,7 @@
 
 import com.google.common.base.Objects;
 import io.netty.buffer.ByteBuf;
+import org.onosproject.lisp.msg.exceptions.LispParseError;
 
 import static com.google.common.base.MoreObjects.toStringHelper;
 
@@ -169,4 +170,15 @@
             return new DefaultLispMapReply(nonce, recordCount, probe, etr, security);
         }
     }
+
+    /**
+     * A private LISP message reader for MapReply message.
+     */
+    private static class ReplyReader implements LispMessageReader<LispMapReply> {
+
+        @Override
+        public LispMapReply readFrom(ByteBuf byteBuf) throws LispParseError {
+            return null;
+        }
+    }
 }