CLONE - A teacher can choose a grading scale for rating forum posts and can restrict rating to within certain dates

This test requires a forum in which several students have posted over a period of several days.

1. Login as a teacher and select a particular grading scale for the forum.
2. Check that forum posts can be given a rating from the selected grading scale.
3. Set dates to restrict ratings to posts with dates within the range.
4. Check that only forum posts within the range of dates can be given a rating.