Establish better pattern for table column translations

[shelleydoljack]

AuthorizedUser table column translations are in lib/constants.rb. For e-loader package management, some data translations are in the model, but the column translations are in config/locales/en.yml. On production deployment we had an issue with getting to authorized users because in rails 5, autoload_paths didn't load lib/ anymore even though we had it configured in config/application.rb. c4846aa fixed the issue for now. We should consider moving the column translations somewhere else.