【dont merge】update_seq2seq_models, test=document_fix

[hysunflower]

• seq2seq 模型迁移到套件
• 存在问题
  • 模型调用hapi 后，log单位是samples/s，不符合性能统计规范。需模型方和hapi 给出具体方案
  • 套件下模型参数和models 下参数相比有较大的diff, models 如

这样一来，需模型重新提供一个可与套件内模型对比的竞品版本

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