预下单使用测试账号可以返回信息，使用已经注册的闪送账号则返回”提交订单错误“

测试账号：

{"resultcode":0,"resultmsg":"ok","fee":10,"delivery_token":"test_delivery_token","dispatch_duration":300}

闪送账号：

{"resultcode":1,"resultmsg":"提交订单错误"}