Added ability to configure GUI traffic refresh rate

Change-Id: Iceb1196a20c16f09218218da2e095fbe9644bb04
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
index 6a41cf2..1c0fb81 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
@@ -48,13 +48,12 @@
     /**
      * Constructs a traffic monitor.
      *
-     * @param trafficPeriod  traffic task period in ms
      * @param servicesBundle bundle of services
      * @param msgHandler     our message handler
      */
-    public Traffic2Monitor(long trafficPeriod, ServicesBundle servicesBundle,
+    public Traffic2Monitor(ServicesBundle servicesBundle,
                            Topo2TrafficMessageHandler msgHandler) {
-        super(trafficPeriod, servicesBundle, msgHandler);
+        super(servicesBundle, msgHandler);
         this.msgHandler = msgHandler;
     }