[ISSUE #74]upgrade rocketmq version to 4.9.3

[zhangjidi2016]

What is the purpose of the change

#74

Brief changelog

XX

Verifying this change

XXXX

Follow this checklist to help us incorporate your contribution quickly and easily. Notice, it would be helpful if you could finish the following 5 checklist(the last one is not necessary)before request the community to review your PR.

• 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 [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test(over 80% coverage) 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 mvn -B clean apache-rat:check findbugs:findbugs checkstyle:checkstyle to make sure basic checks pass. Run mvn clean install -DskipITs to make sure unit-test pass. Run mvn clean test-compile failsafe:integration-test to make sure integration-test pass.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

[codecov-commenter]

Codecov Report

Merging #75 (24d42cb) into master (0fc7ca9) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #75   +/-   ##
=========================================
  Coverage     76.79%   76.79%           
  Complexity      753      753           
=========================================
  Files            88       88           
  Lines          2586     2586           
  Branches        235      235           
=========================================
  Hits           1986     1986           
  Misses          466      466           
  Partials        134      134           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0fc7ca9...24d42cb. Read the comment docs.