Signed-off-by: zhengyangyong yangyong.zheng@huawei.com

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a JIRA issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a JIRA issue. Your pull request should address just this issue, without pulling in other changes.
• Each commit in the pull request should have a meaningful subject line and body.
• Format the pull request title like [SCB-XXX] Fixes bug in ApproximateQuantiles, where you replace SCB-XXX with the appropriate JIRA issue.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Run mvn clean install to make sure basic checks pass. A more thorough check will be performed on your pull request automatically.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

Add status code to metrics output file name for better effect
before :
mwf.mwf-log4j-springboot.mwf-log4j-springboot.demoServiceEndpoint.fun.producer.execution.latency.dat
now :
mwf.mwf-log4j-springboot.mwf-log4j-springboot.demoServiceEndpoint.fun.producer.execution.latency.(status code like 200).dat