* Add student1 and student2 login/logout steps for the course
participants filtering scenario in order to have last access data
for students 1 and 2 since the participants table is sorted by last
access by default.
* Remove @javascript tags for the following scenario:
- Filter users on assignment submission page
- Filter users on view gradebook page
- Filter users on course participants page
JS is not really necessary in these scenario and we can get faster
execution time.