CLC-4495 - Added API end-point to serve official sections data for existing course sites
CLC-4495 - Refactored CanvasCourseProvisioningController to use shared authentication and exception handling methods. Added #course_site_info to serve course site information
CLC-4534 - Adds canvas course data to feed when canvas_course_id option present
CLC-4534 - Updated CanvasCourseProvisioningController#get_feed to use canvas_course_id parameter