MDL-43185 behat: Use realpath on existing paths
MDL-42084 Fix breakage in grader preferences page
Merge branch 'MDL-43185-master' of git://github.com/FMCorz/moodle
Merge branch 'MDL-42084-master' of git://github.com/sammarshallou/moodle
MDL-42174 More behat tests for filepicker
filemanager corrections