replaced test config files with default config

[jstucke]

• replaced test config files with default config
  • this fixes the problem that these config files always need to be updated as well if the default config changes
  • additional advantage: the default config is tested and the tests make sure that it is valid

resolves #1036

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.87%. Comparing base (58fe736) to head (3c93be6). Report is 7 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1296 +/- ## ========================================== - Coverage 92.25% 91.87% -0.38% ========================================== Files 376 376 Lines 22054 21080 -974 ========================================== - Hits 20346 19368 -978 - Misses 1708 1712 +4 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.