Adding cron_d matchers for ChefSpec
Cleanup: Separated crontab handling in own provider
Pleasing rubocop
Finally: Working test with mocks for easybib_crontab provider
Fixed matchers, changed test description to correct string
Bugfix: Fakefs is no longer used
Bugfix: Default-Param should be empty, not nil
Pleasing rubocop
Merge pull request #264 from fh/t/cron-tests

easybib crontab: Refactoring and tests