Fix missing import of get_redirect_url in totp and U2F

mfa/U2F.py

@@ -12,6 +12,7 @@ from django.conf import settings
 from django.http import HttpResponse
 from .models import *
 from .views import login
+from .Common import get_redirect_url
 import datetime
 from django.utils import timezone
 

mfa/totp.py

@@ -1,6 +1,7 @@
 from django.shortcuts import render
 from django.views.decorators.cache import never_cache
 from django.http import HttpResponse
+from .Common import get_redirect_url
 from .models import *
 from django.template.context_processors import csrf
 import simplejson