Fix #872: No module named 'django.utils.importlib' (Django dev)

mongoengine/django/mongo_auth/models.py

@@ -3,7 +3,11 @@ from django.contrib.auth.hashers import make_password
 from django.contrib.auth.models import UserManager
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
-from django.utils.importlib import import_module
+try:
+    from django.utils.module_loading import import_module
+except ImportError:
+    """Handle older versions of Django"""
+    from django.utils.importlib import import_module
 from django.utils.translation import ugettext_lazy as _