Saving attempts of practice lessons

What this patch do Before this patch when the lesson was a practice one, no record was created in lesson_grades and records in lesson_attempts were deleted After this patch a record in lesson_grades is always created or updated even for practice lessons and records in lesson attempts are never deleted. This patch don't change database structure but existing practice lessons are modified so that heir behaviour is not changed (prior to that patch as attempts to questions were deleted at the end of the lesson it was possible to re-take the lesson even if "Re-takes allowed" setting was set to "No", but now that attempts are no more deleted it is necessary to set "Re-takes allowed" explicitly to "Yes" to allow multiple re-takes of the lesson) So testing must verify that nothing is broken for existing attempts and for new attempts. Before applying this patch You need a course with 2 students Student 1 and Student 2 create a lesson with "Allow student review" set to "Yes" in the "Flow control" section and "Practice lesson" set to "Yes" and "Re-takes allowed" set to "No" in the "Grade" section add a question page (any type will do) and a content page with a jump to next page to the lesson logout, connect as Student 1 and attempt the lesson answer the question and navigate until you reach the end of lesson page verify that you can re-take the lesson one more time even if "Re-takes allowed" is set to "No" don't attempt the lesson as Student 2 After applying this patch connected as a teacher, going to the lesson's "Reports" tab or menu verify that "No attempts have been made on this lesson." is displayed (this is because the attempts made by student 1 were deleted as the present patch was not yet applied when he made them) Display the lesson settings and verify "Re-takes allowed" has been changed to "Yes" during upgrade connect as student 1 and attempt the lesson again. You should see no error or notice as if you were attempting the lesson for the first time. Click on "Review lesson" link and you should be able to review all lesson pages but your answers to question should be read-only return to course and click on the lesson again, you should be able to re-take the lesson with no problem logout and connect as Student 2, and attempt the lesson, you should see no error or notice and be able to answer question and navigate until you reach the end of lesson page. Click on "Review lesson" link and you should be able to review all lesson pages but your answers to question should be read-only return to course and click on the lesson again, you should be able to re-take the lesson with no problem logout, connect as a teacher and go to the "Reports" tab or menu and verify you see both Student 1 and Student 2 attempts to question