Allow RAMCloud to start from a configurable option

Change-Id: Iaab651dbb19be7abe71431a243feca5960d7faf2
diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
index 74c8075..5ff1dc5 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
@@ -126,7 +126,7 @@
      * Startup processing.
      */
     private void startup() {
-	this.dbHandler = GraphDBManager.getDBOperation("ramcloud", "/tmp/ramcloud.conf");
+	this.dbHandler = GraphDBManager.getDBOperation();
 
 	//
 	// Obtain the initial Topology state