Use catalog service for course info.

Fixed course save button not redirecting

[SOL-2004] Display seats instead of courses in catalog preview API endpoint.

Rename start and end datetime parameters; Refactor update dictionary creation method;

[SOL-2038] Add a check if email_domains are in coupon update data before updating it

Remove API constants

Fix Coupon Acceptance Tests

Add a list of email domains to an offer for validation at redemption.

Updated translations

[SOL-2033] Change voucher list to raw ID list in basket details admin page.

SOL-1991: Create Management Command for adding Site and SiteThemes

Remove attempts to reverse catalogue URLs from templates

We don't use URLs from the catalogue app. ECOM-5204.

[SOL-1989] Remove duplicate invoices

Upgrade to edx-auth-backends 0.5.2

SOL-1926: Add organization filter on courses.

This resolves migration issues related to the changing of the app's name.

ECOM-5232

Bump auth-backends to 0.5.1

Requires at least PSA 0.2.20, which includes an index on the Association model.

Change edx-django-release-util version.

Add missing basket_addition call.  Handle call to post_checkout with no user=