Course completion and Activity completion reports fail to filter UTF8 Firstname or Lastname

NOTE: This should be tested with mysql and mssql. Currently we do not support accent insensitive text comparisons in postgresql and oracle. Create several users. make sure their firstname/lastname begins with a non-ASCII character (ex. Édward Johnson, John Öakes, Ían Ñelson). Create a Course. Enrol the created Users in the Course. Go to Course > Course administration > Reports > Course completion (/report/completion/index.php?course=COURSEID). Filter the users by first name and surname (try multiple variations). make sure the filter works properly and filters out the non-ASCII names. Go to Course > Course administration > Reports > Activity completion (/report/progress/index.php?course=COURSEID). Filter the users by first name and surname (try multiple variations). make sure the filter works properly and filters out the non-ASCII names.