Describe the bug

The message the output_dir is not specified. /ensemble_output will be used to save ensemble predictions.

To Reproduce
Steps to reproduce the behavior:

python tests/test_integration_autorunner.py

2023-04-26 06:54:37,178 - INFO - The output_dir is not specified. /tmp/tmpqv1zas88/work_dir/ensemble_output will be used to save ensemble predictions.
2023-04-26 06:54:37,182 - INFO - The output_dir is not specified. /tmp/tmpqv1zas88/work_dir/ensemble_output will be used to save ensemble predictions.

Expected behavior

Should print once in mGPU settings.