Format responses as a JSON dict containing an error_code and a developer_message. user_message is not necessary, as these are API level errors, not seen by end users. MA-1900
* Upgrade edx-submissions * Upgrade edx-ora2 * Upgrade edx-val * Upgrade edx-proctoring * Update all edx-platform code that depends on DRF, including: - auth_exchange - cors_csrf - embargo - enrollment - util - commerce - course_structure - discussion_api - mobile_api - notifier_api - teams - credit - profile_images - user_api - lib/api (OAuth2 and pagination)
TNL-1537 Co-Authored-By: Andy Armstrong <andya@edx.org> Co-Authored-By: cahrens <christina@edx.org>