Implement "translations" AMD
    
    This module is used to get translated messages via JSON
    request in a synchronous manner. To ensure translatability
    i18n messages should be initialized before any other JS code
    interacted with user is run.
    
    Fixes: https://pagure.io/freeipa/issue/7559
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>