register the branch when the xa transaction end

## Why you need it?
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本地生成branchid 如果当前rm出现异常，肯定是走rollback，这样减少了一次rpc注册分支的开销，直接rollback即可
而rm正常提交的时候，会走end和prepare，当在end和prepare之间应该进行一次分支注册

## How it could be?
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