Updated module translations will not be loaded without restarting puppet

Once a module's translations have been added to gettext's translation repositories, they will not be updated, even if the underlying translation files change. For modules, in general when source files change at run time, the changes are picked up immediately. We would like to see the same behavior with translations, so we should investigate ways of reloading translation files and adding them to the translation repositories when updates are made to a module's PO files.