[ISSUE #7791] Polish the code for jraft controller

[RongtongJin]

Which Issue(s) This PR Fixes

Fixes #7791

Brief Description

Polish the code for jraft controller

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (8df53df) 42.94% compared to head (d180a4d) 42.97%.

Files	Patch %	Lines
...n/java/org/apache/rocketmq/common/JraftConfig.java	0.00%	7 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7792      +/-   ##
=============================================
+ Coverage      42.94%   42.97%   +0.03%     
- Complexity      9902     9904       +2     
=============================================
  Files           1190     1190              
  Lines          85930    85930              
  Branches       11070    11070              
=============================================
+ Hits           36906    36932      +26     
+ Misses         44458    44428      -30     
- Partials        4566     4570       +4     

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