[ONOS-6235] Implement an interpreter of LispExtensionMappingAddress

Change-Id: I39f66d5e3bcee50b361a6ba33f3fa09e2599f7df
diff --git a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispSrcDstAddress.java b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispSrcDstAddress.java
index 95c3be3..4208265 100644
--- a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispSrcDstAddress.java
+++ b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispSrcDstAddress.java
@@ -156,7 +156,7 @@
 
     @Override
     public String toString() {
-        return toStringHelper(this)
+        return toStringHelper(type().toString())
                 .add("source prefix", srcPrefix)
                 .add("destination prefix", dstPrefix)
                 .add("source mask length", srcMaskLength)