Add unit tests for LISP address serializer and deserializer

Change-Id: I56538221f3951d18c1feb9343d87cbb46c3ed04d
diff --git a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAfiAddress.java b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAfiAddress.java
index 1d88008..c7e72c5 100644
--- a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAfiAddress.java
+++ b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAfiAddress.java
@@ -126,6 +126,10 @@
 
         @Override
         public void writeTo(ByteBuf byteBuf, LispAfiAddress address) throws LispWriterException {
+
+            // AFI code
+            byteBuf.writeShort(address.getAfi().getIanaCode());
+
             switch (address.getAfi()) {
                 case IP:
                     new LispIpAddress.IpAddressWriter().writeTo(byteBuf, (LispIpv4Address) address);