- Added `DISCOVERY_REPOS` to allow configuring discovery repository details.
- Role: edx_django_service
- Made the keys `edx_django_service_git_protocol`, `edx_django_service_git_domain`, and `edx_django_service_git_path` of `edx_django_service_repos` all individually configurable.
- Role: discovery
- Updated LANGUAGE_CODE to generic english. Added configuration for multilingual language package django-parler.