Django 1.9 compatibility

cas_server/models.py

@@ -38,7 +38,7 @@ class User(models.Model):
         unique_together = ("username", "session_key")
     session_key = models.CharField(max_length=40, blank=True, null=True)
     username = models.CharField(max_length=30)
-    date = models.DateTimeField(auto_now_add=True, auto_now=True)
+    date = models.DateTimeField(auto_now=True)
 
     @classmethod
     def clean_old_entries(cls):

cas_server/utils.py

@@ -12,7 +12,6 @@
 """Some util function for the app"""
 from .default_settings import settings
 
-from django.utils.importlib import import_module
 from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect, HttpResponse
 from django.contrib import messages
@@ -20,6 +19,7 @@ from django.contrib import messages
 import random
 import string
 import json
+from importlib import import_module
 
 try:
     from urlparse import urlparse, urlunparse, parse_qsl