- Added GOOGLE_SITE_VERIFICATION_ID to move a previously hardcoded value into configuration.
- Changed `EDXAPP_RETIRED_USERNAME_FMT` to `EDXAPP_RETIRED_USERNAME_PREFIX`. Changed/split `EDXAPP_RETIRED_EMAIL_FMT` to be `EDXAPP_RETIRED_EMAIL_PREFIX` and `EDXAPP_RETIRED_EMAIL_DOMAIN`.
- Role xqueue
- Removed RabbitMQ in earlier changes in XQueue itself, we don't need any of the configuration