Initial commit for LISP SBI Encoder and Decoder package

This commit is for check-in initial skeleton code of LISP message
encoder and decoder.

Change-Id: I007240036852a78ac273e9ec4a84a07ab22ba675
diff --git a/protocols/lisp/pom.xml b/protocols/lisp/pom.xml
index f9528f8..f8245e8 100644
--- a/protocols/lisp/pom.xml
+++ b/protocols/lisp/pom.xml
@@ -30,6 +30,7 @@
     <modules>
         <module>api</module>
         <module>ctl</module>
+        <module>msg</module>
     </modules>
 
     <description>ONOS LISP southbound plugin</description>