Test: Restart ONOS with default network cfg after vrouter/dhcprelay tests are run.
This puts ONOS back to initial state for other tests.

Change-Id: Ib20538399737789c11def76189a77bc651289506
diff --git a/src/test/vrouter/vrouterTest.py b/src/test/vrouter/vrouterTest.py
index 89f11fc..9ca696a 100644
--- a/src/test/vrouter/vrouterTest.py
+++ b/src/test/vrouter/vrouterTest.py
@@ -92,6 +92,7 @@
     def tearDownClass(cls):
         '''Deactivate the vrouter apps'''
         #cls.vrouter_host_unload()
+        cls.start_onos(network_cfg = {})
 
     @classmethod
     def load_device_id(cls):