text: Title: Add logging tests
  Body: This problem (https://github.com/wemake-services/wemake-django-template/commit/53ae125a0e2eed88f7b36a5edd07591ba0401b24) identified that our logging configuration was and is not tested at all.
  
  We need to add tests for it:
  - We need to test regular logging format
  - We need to test exception logging format
  
  Please, feel free to send PRs :)