Remove old commons-lang

Change-Id: Ide55420110558142747a0b85b0c6ad0de41691b7
diff --git a/src/main/java/net/onrc/onos/core/packet/IPv4.java b/src/main/java/net/onrc/onos/core/packet/IPv4.java
index 39a3ee1..492b2f1 100644
--- a/src/main/java/net/onrc/onos/core/packet/IPv4.java
+++ b/src/main/java/net/onrc/onos/core/packet/IPv4.java
@@ -26,7 +26,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import org.apache.commons.lang.ArrayUtils;
+import org.apache.commons.lang3.ArrayUtils;
 
 // CHECKSTYLE IGNORE WriteTag FOR NEXT 2 LINES
 /**