

**Description**

We are using a 3rd party executor which has the ability to use multiple queues, however the `default_queue` is defined under the `celery` heading and is used regardless of the executor that you are using.

See: https://github.com/apache/airflow/blob/2.0.1/airflow/models/baseoperator.py#L366

It would be nice to decouple the default_queue configuration argument away from the celery section to allow other executors to utilise this functionality with less confusion.

**Are you willing to submit a PR?**

Yep! Will open a pull request shortly


**Related Issues**

Not that I'm aware of.

airflow/cli/cli_parser.py
ActionCommand(
        name='add-role',
        help='Add role to a user',
        func=lazy_load_command('airflow.cli.commands.user_command.add_role'),
        args=(ARG_USERNAME_OPTIONAL, ARG_EMAIL_OPTIONAL, ARG_ROLE),
    ),
    ActionCommand(
        name='remove-role',
        help='Remove role from a user',
        func=lazy_load_command('airflow.cli.commands.user_command.remove_role'),
        args=(ARG_USERNAME_OPTIONAL, ARG_EMAIL_OPTIONAL, ARG_ROLE),
    ),
    ActionCommand(
        name='import',
        help='Import users',
        func=lazy_load_command('airflow.cli.commands.user_command.users_import'),
        args=(ARG_USER_IMPORT,),
    ),
    ActionCommand(
        name='export',
        help='Export all users',
        func=lazy_load_command('airflow.cli.commands.user_command.users_export'),
        args=(ARG_USER_EXPORT,),
    ),
)
ROLES_COMMANDS = (
    ActionCommand(
        name='list',
        help='List roles',
        func=lazy_load_command('airflow.cli.commands.role_command.roles_list'),