move assignment inside __main__

Author: asirko-soft

src/python_testing/TC_CADMIN_1_3_4.py

@@ -345,8 +345,7 @@ async def test_TC_CADMIN_1_4(self):
         await self.combined_commission_val_steps(commission_type="BCM")
 
 
-global __test_class__
-__test_class__ = TC_CADMIN
-
 if __name__ == "__main__":
+    # This makes the test class discoverable by the test runner
+    __test_class__ = TC_CADMIN
     default_matter_test_main()