Adding configurability to the even accumulator for the topology provider.

Change-Id: I35ede9a62782dc6a2e55b8895aeec6ece8836960
diff --git a/core/net/src/test/java/org/onlab/onos/net/topology/impl/DefaultTopologyProviderTest.java b/core/net/src/test/java/org/onlab/onos/net/topology/impl/DefaultTopologyProviderTest.java
index 3ea1abb..56594233 100644
--- a/core/net/src/test/java/org/onlab/onos/net/topology/impl/DefaultTopologyProviderTest.java
+++ b/core/net/src/test/java/org/onlab/onos/net/topology/impl/DefaultTopologyProviderTest.java
@@ -67,12 +67,12 @@
         provider.deviceService = deviceService;
         provider.linkService = linkService;
         provider.providerRegistry = topologyService;
-        provider.activate();
+        provider.activate(null);
     }
 
     @After
     public void tearDown() {
-        provider.deactivate();
+        provider.deactivate(null);
         provider.providerRegistry = null;
         provider.deviceService = null;
         provider.linkService = null;