Converting course section ID to string for sake of consistency with returned values
Added CanvasCourseAddUserController#add_user to process requests to add user to course section
Removed unnecessary puts statements. Removed duplicate test for canvas course user sections (covered in CanvasCourseUserProxy spec).
Replaced canvas course ID 1234123 with 767330 to make it consistent with other VCR recordings
Updated with newer Rspec syntax. Investigating this test failure with Ray further soon.
Added CanvasCourseAddUser#add_user_to_course_section with exception handling, no functionality
Switched back to full object representation in select options. Added handling to display import success message upon success response from back-end API