Use explicit checkstyle configuration for tests

[corebonts]

Tests failed on Windows systems as the test file uses LF ending.

[codecov-io]

Codecov Report

Merging #233 (1a2753e) into master (1c699a2) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #233   +/-   ##
=========================================
  Coverage     72.38%   72.38%           
  Complexity      608      608           
=========================================
  Files           146      146           
  Lines          1988     1988           
  Branches        131      131           
=========================================
  Hits           1439     1439           
  Misses          489      489           
  Partials         60       60           

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[SpOOnman]

Thank you!