Update log4j config testMode default value

[ziminghua]

I don't think the default value should be true，As a configuration for the production, it is best to have automatic archiving

[github-actions]

Thanks for your this PR. 🙏
Please check again for your PR changes whether contains any usage/api/configuration change such as Add new API , Add new configuration, Change default value of configuration.
If so, please add or update documents(markdown type) in docs/next/ for repository nacos-group/nacos-group.github.io

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感谢您提交的PR。 🙏
请再次查看您的PR内容，确认是否包含任何使用方式/API/配置参数的变更，如：新增API、新增配置参数、修改默认配置等操作。
如果是，请确保在提交之前，在仓库nacos-group/nacos-group.github.io中的docs/next/目录下添加或更新文档（markdown格式）。

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.32%. Comparing base (b4d9642) to head (8c5151c).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #13062      +/-   ##
=============================================
- Coverage      72.32%   72.32%   -0.01%     
+ Complexity     10028    10027       -1     
=============================================
  Files           1310     1310              
  Lines          42007    42007              
  Branches        4411     4411              
=============================================
- Hits           30381    30380       -1     
- Misses          9519     9520       +1     
  Partials        2107     2107              

see 5 files with indirect coverage changes

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[wuyfee]

$\color{green}{SUCCESS}$
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