The mobile app is getting unexpected 403s from /oauth2/exchange_access_token/, but we have been unable to pinpoint from where they are coming. This commit introduces a temporary exception handler to provide stack info for 403s on this endpoint to try to track down the source. Requires the ENABLE_403_MONITORING setting to be set to True to enable the logging. ARCHBOM-1667
LMS (Learning Management System) -------------------------------- This directory contains code relating to the student portal for edX.