test: update config retrieval

tests/test_app.py

tests/test_clock_handler.py

tests/test_config.py

tests/test_domain.py

tests/test_engine_event_dispatcher.py

tests/test_engine_resources.py

tests/test_logger.py

tests/test_monitor.py

tests/test_scheduling_api_fetcher.py

tests/test_scheduling_api_steering.py

tests/test_scheduling_api_tank.py

tests/test_scheduling_scheduler.py

tests/test_scheduling_timetable.py

tests/test_scheduling_utils.py

tests/test_simple_api.py

tests/test_simple_api_cached.py