Revert part of [31788] because it prevents projects to reuse testXHTML for their own BT

See also [27652]

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31789 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testXHTML.py

@@ -562,14 +562,13 @@ elif validator_to_use == 'tidy':
   else:
     validator = TidyValidator(validator_path, show_warnings)
 
-if validator is not None:
+def test_suite():
+  # add the tests
+  if validator is not None:
     # add erp5_core to the list here to not return it
     # on getBusinessTemplateList call
     addTestMethodDynamically(validator,
       ('erp5_core',) + TestXHTML.getBusinessTemplateList())
-
-def test_suite():
-  # add the tests
   suite = unittest.TestSuite()
   suite.addTest(unittest.makeSuite(TestXHTML))
   return suite