Fixed some PMD issues in the SDN-IP module

Change-Id: Iaf002e70c1a00f0008edef5e77b91579acf146aa
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/Interface.java b/src/main/java/net/onrc/onos/apps/bgproute/Interface.java
index 52e9a32..0339401 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/Interface.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/Interface.java
@@ -60,7 +60,7 @@
 
     @Override
     public boolean equals(Object other) {
-        if (other == null || !(other instanceof Interface)) {
+        if (!(other instanceof Interface)) {
             return false;
         }