Adj-In RIB code fix

Change-Id: Ice870ab1aff068cc27a5337a3f4ff7090a53d84d
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java
index d719c65..f354b3e 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java
@@ -193,6 +193,12 @@
     }
 
     @Override
+    public int compareTo(Object o) {
+        // TODO Auto-generated method stub
+        return 0;
+    }
+
+    @Override
     public String toString() {
         return MoreObjects.toStringHelper(getClass())
                 .add("mpReachNlri", mpUnReachNlri)