TEMP: Error on overriding TestCase.run()

Author: xylar

Diff for: compass/run/serial.py

@@ -504,7 +504,7 @@ def _test_case_run_deprecated(test_case):
         # the run() method has been overridden.  We need to give the user a
         # deprecation warning.
         actual_location = f'{actual_class.__module__}.{actual_class.__name__}'
-        test_case.logger.warn(
+        raise ValueError(
             f'\nWARNING: Overriding the TestCase.run() method is deprecated.\n'
             f'  Please move the contents of\n'
             f'  {actual_location}.run() \n'