refactor: improve ini config file parsing

[yndu13]

You need to complete

• unit tests and/or feature tests
• documentation is changed or added

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.83333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 91.39%. Comparing base (7ed407e) to head (d8b35cc).

Files with missing lines	Patch %	Lines
...ava/com/aliyun/credentials/utils/ProfileUtils.java	95.60%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #91      +/-   ##
============================================
+ Coverage     91.21%   91.39%   +0.18%     
- Complexity      584      613      +29     
============================================
  Files            44       45       +1     
  Lines          2117     2208      +91     
  Branches        152      169      +17     
============================================
+ Hits           1931     2018      +87     
  Misses          128      128              
- Partials         58       62       +4     

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