Added commit_on_success_with_read_committed decorator to courseware.views.index.

TNL-367
update ora2 to fix TNL-680
Merge pull request #5747 from edx/adam/update-ora2

update ora2 to fix TNL-680
Redirect users to the track selection page or ?next page when using third party auth

Set marketing site logged in cookie from third party auth.
Merge pull request #5751 from edx/usman/tnl367-transaction-level-decorator-3

Added commit_on_success_with_read_committed decorator to courseware.views.index
Fix to marketing iframe middle-click href: course does not always have openable url.
Update tests to match new text.
Merge pull request #5761 from edx/tim/mktg-iframe-fix

Do not show middle-click href in marketing iframe for logged in users
Merge pull request #5745 from edx/will/third-party-auth-fixes

Third Party Auth Fixes
Merge branch 'release'