stop a machine by name
    :param name: name given to the machine
    :param call: call value in this case is 'action'
    :return: true if successful

    CLI Example:

    .. code-block:: bash

        salt-cloud -a stop vm_name

def stop(name, call=None):
    '''
    stop a machine by name
    :param name: name given to the machine
    :param call: call value in this case is 'action'
    :return: true if successful

    CLI Example:

    .. code-block:: bash

        salt-cloud -a stop vm_name
    '''
    datacenter_id = get_datacenter_id()
    conn = get_conn()
    node = get_node(conn, name)

    conn.stop_server(datacenter_id=datacenter_id, server_id=node['id'])

    return True