Remove old commons-lang

Change-Id: Ide55420110558142747a0b85b0c6ad0de41691b7
diff --git a/src/main/java/net/onrc/onos/core/registry/StandaloneRegistry.java b/src/main/java/net/onrc/onos/core/registry/StandaloneRegistry.java
index 8683a50..d2a9d31 100644
--- a/src/main/java/net/onrc/onos/core/registry/StandaloneRegistry.java
+++ b/src/main/java/net/onrc/onos/core/registry/StandaloneRegistry.java
@@ -18,7 +18,7 @@
 import net.onrc.onos.core.util.IdBlock;
 import net.onrc.onos.core.util.OnosInstanceId;
 
-import org.apache.commons.lang.NotImplementedException;
+import org.apache.commons.lang3.NotImplementedException;
 import org.projectfloodlight.openflow.util.HexString;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;