Removed the old openflowj protocol library

Change-Id: I4fcd0399c6eb0d9089116e365b55505042ded1fc
diff --git a/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java b/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
index fb7b573..5bb7f00 100644
--- a/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
+++ b/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
@@ -44,7 +44,7 @@
 import org.apache.curator.x.discovery.ServiceDiscovery;
 import org.apache.curator.x.discovery.ServiceDiscoveryBuilder;
 import org.apache.curator.x.discovery.ServiceInstance;
-import org.openflow.util.HexString;
+import org.projectfloodlight.openflow.util.HexString;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;