CLOUDSTACK-8445: Keep only dvs tag for test case which tests the VCenter port groups

Signed-off-by: Gaurav Aradhye <gaurav.aradhye@clogeny.com>
This closes #232

test/integration/smoke/test_network.py

@@ -554,7 +554,7 @@ class TestPortForwarding(cloudstackTestCase):
             )
         return
 
-    @attr(tags=["advanced", "dvs"], required_hardware="true")
+    @attr(tags=["dvs"], required_hardware="true")
     def test_guest_traffic_port_groups_isolated_network(self):
         """ Verify port groups are created for guest traffic
         used by isolated network """