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Purpose of this pull request

Which issue you fix

Fixes # (issue 1171).

Checklist:

• I have executed the 'mvn spotless:apply' command to format my code.
• I have a meaningful commit message (including the issue id, the template of commit message is '[label-type-#issue-id][fixed-module] a meaningful commit message.')
• I have performed a self-review of my own code.
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fix the bug issue for https://github.com/DTStack/chunjun/issues/1171，By the way， has add an other lacked param ‘FlushIntervalMills’ for DorisConf

Signed-off-by: 百岁 <mozhenghua19811109@126.com>

make spotless check pass

efaf46b

[Bug] [Doris Sink] param of batchSize set to Doris Sink config is useless #1171

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LGTM @FlechazoW