added uai field to user model and corresponding migrations + edited test oauth server to serve uai info for testing
#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "metaeducation.settings.dev")
from django.core.management import execute_from_command_line
execute_from_command_line(sys.argv)