Adds a vhost via rabbitmqctl add_vhost.

    CLI Example:

    .. code-block:: bash

        salt '*' rabbitmq add_vhost '<vhost_name>'

def add_vhost(vhost, runas=None):
    '''
    Adds a vhost via rabbitmqctl add_vhost.

    CLI Example:

    .. code-block:: bash

        salt '*' rabbitmq add_vhost '<vhost_name>'
    '''
    if runas is None and not salt.utils.platform.is_windows():
        runas = salt.utils.user.get_user()
    res = __salt__['cmd.run_all'](
        [RABBITMQCTL, 'add_vhost', vhost],
        reset_system_locale=False,
        runas=runas,
        python_shell=False)

    msg = 'Added'
    return _format_response(res, msg)