Remove old commons-lang

Change-Id: Ide55420110558142747a0b85b0c6ad0de41691b7
diff --git a/src/main/java/net/onrc/onos/core/packet/DHCP.java b/src/main/java/net/onrc/onos/core/packet/DHCP.java
index be15926..36dc0a8 100644
--- a/src/main/java/net/onrc/onos/core/packet/DHCP.java
+++ b/src/main/java/net/onrc/onos/core/packet/DHCP.java
@@ -23,7 +23,7 @@
 import java.util.List;
 import java.util.ListIterator;
 
-import org.apache.commons.lang.ArrayUtils;
+import org.apache.commons.lang3.ArrayUtils;
 
 // CHECKSTYLE IGNORE WriteTag FOR NEXT 2 LINES
 /**