Return a list of vhost based on rabbitmqctl list_vhosts.

    CLI Example:

    .. code-block:: bash

        salt '*' rabbitmq.list_vhosts

def list_vhosts(runas=None):
    '''
    Return a list of vhost based on rabbitmqctl list_vhosts.

    CLI Example:

    .. code-block:: bash

        salt '*' rabbitmq.list_vhosts
    '''
    if runas is None and not salt.utils.platform.is_windows():
        runas = salt.utils.user.get_user()
    res = __salt__['cmd.run_all'](
        [RABBITMQCTL, 'list_vhosts', '-q'],
        reset_system_locale=False,
        runas=runas,
        python_shell=False)
    _check_response(res)
    return _output_to_list(res['stdout'])