Added Link REST and service for active links
diff --git a/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java b/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
index f172f63..1efe015 100644
--- a/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
+++ b/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
@@ -1,7 +1,7 @@
 package net.floodlightcontroller.linkdiscovery;
 
 import org.codehaus.jackson.map.annotate.JsonSerialize;
-import org.codehaus.jackson.map.ser.ToStringSerializer;
+import org.codehaus.jackson.map.ser.std.ToStringSerializer;
 import org.openflow.util.HexString;
 
 public interface ILinkDiscovery {