Fixing -tox analysis error

Author: fmiquiza

tests/managers/ticket_tests.py

@@ -49,7 +49,7 @@ def test_list_tickets_false(self):
                                       open_status=False,
                                       closed_status=False)
 
-        self.assertEquals('open_status and closed_status cannot both be False', str(exception))
+        self.assertEqual('open_status and closed_status cannot both be False', str(exception))
 
     def test_list_subjects(self):
         list_expected_ids = [1001, 1002, 1003, 1004, 1005]