Regrading quiz attempts should be logged

Test logging of regrading single attempt

1. Create a new quiz, with at least one question.
2. As a student, make a complete attempt at the quiz.
3. As a teacher, view the list of attempts.
4. Check the attempt tickbox, and choose 'Regrade selected attempts'.
5. In the course report logs, an event should have been recorded indicating the student's attempt was regraded by the teacher.

Test logging of regrading multiple regrading

1. Create a new quiz, with at least one question.
2. As a student, make a complete attempt at the quiz.
3. As a second student, make another complete attempt at the quiz.
4. As a teacher, view the list of attempts.
5. Choose 'Regrade all'
6. In the course report logs, a regrading event should be viewable for each individual attempt.