Students can self-assess in a workshop

This test requires a workshop activity in which several students have made submissions.

1. Login as a teacher, update the workshop and tick the 'Use self-assessment' checkbox.
2. In the submission allocation page, tick the 'Add self-assessments' checkbox in the random allocation tab then allocate submissions.
3. In the manual allocation tab, check that each student has themself listed as a reviewer.
4. Switch the workshop to the assessment phase.
5. Login as a student and check that you can assess your own work.