Results 6 comments of Tritone

I'm willing to do it ,pls assign to me.

@AlbumenJ I'm willing to do that ,May you give me more detail for this task?

> It should be changed to `readLength` and `writeLength`. BTW, `org.apache.dubbo.common.serialize.DataInput#readBytes` has no usage now. org.apache.dubbo.common.serialize.DataInput#writeBytes ,It doesn't seem to have been used either