Convert a quaternion in the form of a list in geometry_msgs/Quaternion
    :param quatlist: [x, y, z, w]
    :return:

def list_to_quat(quatlist):
    """
    Convert a quaternion in the form of a list in geometry_msgs/Quaternion
    :param quatlist: [x, y, z, w]
    :return:
    """
    return geometry_msgs.msg.Quaternion(
        x=quatlist[0], y=quatlist[1], z=quatlist[2], w=quatlist[3])