Move build method to each control msg, realize createBuilder method

Change-Id: Iff9e60cc5f929e031b0d927e0bdc08fed826e0db
diff --git a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/LispMapRegister.java b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/LispMapRegister.java
index 4703cba..0ce42db 100644
--- a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/LispMapRegister.java
+++ b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/protocols/LispMapRegister.java
@@ -165,5 +165,12 @@
          * @return RegisterBuilder object
          */
         RegisterBuilder addRecord(LispMapRecord record);
+
+        /**
+         * Builds LISP map register message.
+         *
+         * @return LISP map register message
+         */
+        LispMapRegister build();
     }
 }