added config properties for titan
diff --git a/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java b/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
index e227b71..8ad31c2 100644
--- a/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
+++ b/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
@@ -1869,7 +1869,7 @@
 
         // Initialize the link storage connector to the network map
         this.linkStore = new LinkStorageImpl();
-        this.linkStore.init("");
+        this.linkStore.init("/tmp/cassandra.titan");
         
         ScheduledExecutorService ses = threadPool.getScheduledExecutor();