Flaky JUnit Tests identified in apollo-biz

How did we detect Flaky Test ?

We detected the existence of flaky test using the tool NonDex

Command

• I have checked the discussions
• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Describe the bug
Flaky junit test identified in apollo-biz

To Reproduce
Steps to reproduce the behavior:

1. mvn -pl apollo-biz edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=com.ctrip.framework.apollo.biz.entity.JpaMapFieldJsonConverterTest#convertToDatabaseColumn_twoElement

Test : com.ctrip.framework.apollo.biz.entity.JpaMapFieldJsonConverterTest#convertToDatabaseColumn_twoElement

Expected behavior
The testcase should pass everytime