Pull request template

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• [ ] Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• [ ] Format the pull request title like . Each commit in the pull request should have a meaningful subject line and body.
• [ ] Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
• [ ] Run to make sure basic checks pass. Run to make sure unit-test pass. Run to make sure integration-test pass.