Merge pull request #3578 from edx/db/500-template-on-studio

Show error page templates on Studio

cms/urls.py

@@ -140,3 +140,9 @@ if settings.DEBUG:
 # pylint: disable=C0103
 handler404 = 'contentstore.views.render_404'
 handler500 = 'contentstore.views.render_500'
+
+# display error page templates, for testing purposes
+urlpatterns += (
+    url(r'404', handler404),
+    url(r'500', handler500),
+)