Add tests to checkstyle

[tadgh]

• Add tests to checkstyle
• Suppress various hamcrest complaints until we fix them
• Name suppression modules:
  • HapiErrorCodeUniqueness
  • NoPrintln
• Work on suppressions:
  • unsuppress tests
  • suppress hapi error checker in test files
  • suppress hamcrest complaints in MDM
• You can now suppress checkstyle warnings on classes/methods by annotating with the ID of the check.

@SuppressWarnings("checkstyle:NoPrintln")

[github-actions]

Formatting check succeeded!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.46%. Comparing base (497b9f2) to head (c0626bb).
Report is 95 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6006      +/-   ##
============================================
+ Coverage     83.39%   83.46%   +0.06%     
- Complexity    26927    27237     +310     
============================================
  Files          1681     1697      +16     
  Lines        103965   105320    +1355     
  Branches      13189    13311     +122     
============================================
+ Hits          86702    87902    +1200     
- Misses        11613    11718     +105     
- Partials       5650     5700      +50     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.