Changed the Student Model cleaner to deal with the new Student properties.
Patch by: Madhusudan.C.S and Lennard de Rijk
Reviewed by: to-be-reviewed
#!/usr/bin/env python
"""
Daily cleanup job.
Can be run as a cronjob to clean out old data from the database (only expired
sessions at the moment).
"""
from django.core import management
if __name__ == "__main__":
management.call_command('cleanup')