optimize arklet modules

[Lunarscave]

• fix actuator pom
• add unit test for healthhandler
• optimize code

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (77b7075) 46.19% compared to head (3c8ec4b) 41.31%.
Report is 125 commits behind head on master.

❗ Current head 3c8ec4b differs from pull request most recent head 417e7d7. Consider uploading reports for the commit 417e7d7 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #122      +/-   ##
============================================
- Coverage     46.19%   41.31%   -4.88%     
+ Complexity      160      137      -23     
============================================
  Files            45       45              
  Lines          1156     1152       -4     
  Branches         56       56              
============================================
- Hits            534      476      -58     
- Misses          597      648      +51     
- Partials         25       28       +3     

Files	Coverage Δ
.../arklet/core/command/builtin/model/PluginInfo.java	31.57% <100.00%> (ø)
...ess/arklet/core/health/indicator/CpuIndicator.java	95.55% <ø> (ø)
...erless/arklet/core/health/indicator/Indicator.java	100.00% <100.00%> (ø)
...ess/arklet/core/health/indicator/JvmIndicator.java	100.00% <100.00%> (ø)
...sofa/serverless/arklet/core/util/ConvertUtils.java	66.66% <ø> (+26.66%)	⬆️
...rverless/arklet/core/health/HealthServiceImpl.java	56.66% <90.90%> (+18.62%)	⬆️

... and 24 files with indirect coverage changes

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