Unloaded config file does not give an error message

[mariahendrike]

I start xtas with:
celery -A xtas.tasks worker --loglevel=info --config=xtas_config.py

When xtas_config.py is not in my PYTHONPATH in the location that I am in and it therefore doesn't load the config file, it should have an understandable error message.

[larsmans]

There's already

logger.info('Cannot import xtas_config, falling back to default')

in xtas/core.py, but apparently the loglevel is only set by app.start, later on.