When Drupal attempts to enroll a user in a closed course, a 406 will
be returned. This causes the marketing site to redirect to the track
selection page for that course, which will then redirect to the
dashboard with a nice message.
ECOM-2317
This new endpoint is intended to replace enrollment API call used on the login+registration page. Instead of directly enrolling students, the view will contact the external e-commerce API (Oscar) to create a new order. Oscar will be responsible for completing the order and enrolling the student.
This behavior will only apply to course modes with associated SKUs. All other course mode enrollments will be processed directly by LMS.
