CLONE - A teacher can set a course language

This test requires a site with at least 3 language packs installed.

1. Login as a teacher, edit your profile and select a preferred language which is different from the site language.
2. Check that the interface is displayed in the preferred language.
3. In the course settings, select a different language again for the course.
4. Check that the language for the course overrides the site and user languages.