Fix context processors in sandbox settings

sites/sandbox/settings.py

 
 ALLOWED_HOSTS = [
     'latest.oscarcommerce.com',
-    'master.oscarcommerce.com'
+    'master.oscarcommerce.com',
+    'localhost',
 ]
 
 # This is needed for the hosted version of the sandbox
             ],
             'context_processors': [
                 'django.contrib.auth.context_processors.auth',
-                'django.core.context_processors.request',
-                'django.core.context_processors.debug',
-                'django.core.context_processors.i18n',
-                'django.core.context_processors.media',
-                'django.core.context_processors.static',
+                'django.template.context_processors.request',
+                'django.template.context_processors.debug',
+                'django.template.context_processors.i18n',
+                'django.template.context_processors.media',
+                'django.template.context_processors.static',
                 'django.contrib.messages.context_processors.messages',
 
                 # Oscar specific