Ticket 47815 - Add operations rejected by betxn plugins remain in cache

Bug Description:

	CI test miss '@' in fixture declaration

https://fedorahosted.org/389/ticket/47815

Platforms tested: F19 jenkins

Flag Day: no

Doc impact: no

dirsrvtests/tickets/ticket47815_test.py

@@ -22,7 +22,7 @@ class TopologyStandalone(object):
         self.standalone = standalone
 
 
-pytest.fixture(scope="module")
+@pytest.fixture(scope="module")
 def topology(request):
     '''
         This fixture is used to standalone topology for the 'module'.