Change the REST API so adding a flow is using path "/add/json"
instead of "/add/{flow}/json", because now we use POST mechanism
to add a flow.
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/FlowWebRoutable.java b/src/main/java/net/floodlightcontroller/flowcache/web/FlowWebRoutable.java
index 0859397..a885bdb 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/FlowWebRoutable.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/FlowWebRoutable.java
@@ -13,7 +13,7 @@
     @Override
     public Restlet getRestlet(Context context) {
         Router router = new Router(context);
-        router.attach("/add/{flow}/json", AddFlowResource.class);
+        router.attach("/add/json", AddFlowResource.class);
         router.attach("/delete/{flow-id}/json", DeleteFlowResource.class);
         router.attach("/get/{flow-id}/json", GetFlowByIdResource.class);
         router.attach("/get/{installer-id}/{src-dpid}/{src-port}/{dst-dpid}/{dst-port}/json", GetFlowByInstallerIdResource.class);