[IMP] website_slides: add a member course tour

PURPOSE

Test frontend and UI tools of eLearning.

SPECIFICATIONS

This commit adds a course tour that test a flow for course members. Main
steps of this tour are :

  * an user (either employee, website publisher or portal) joins a public
    course;
  * he has access to the full course content when he's a member of the
    course;
  * he uses fullscreen player to complete the course;
  * he rates the course;

LINKS

Task ID 1937768