[SCB-2475] migrate generator-core module to junit5

[lovehzj]

No description provided.

[codecov-commenter]

Codecov Report

Merging #3425 (64e0282) into master (870dbdc) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3425      +/-   ##
============================================
- Coverage     77.55%   77.55%   -0.01%     
  Complexity     1465     1465              
============================================
  Files          1650     1650              
  Lines         43943    43943              
  Branches       3700     3700              
============================================
- Hits          34081    34079       -2     
- Misses         8315     8317       +2     
  Partials       1547     1547              

Impacted Files	Coverage Δ
...thentication/consumer/RSAConsumerTokenManager.java	70.96% <0.00%> (-6.46%)	⬇️
...comb/core/definition/MicroserviceVersionsMeta.java	94.73% <0.00%> (-5.27%)	⬇️
...mb/config/ConfigCenterConfigurationSourceImpl.java	9.57% <0.00%> (-1.07%)	⬇️
...mb/metrics/core/meter/os/cpu/AbstractCpuUsage.java	100.00% <0.00%> (+11.11%)	⬆️

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