tests: get urllib from six

tests/test_broadcasting.py

@@ -2,7 +2,6 @@ import pytest
 from uuid import uuid4
 import os
 import re
-import urllib
 import logging
 import mock
 import random
@@ -12,6 +11,7 @@ from django.core.urlresolvers import reverse
 from django.core import mail, signing
 from django.utils import timezone
 from django.core.files.storage import DefaultStorage
+from django.utils.six.moves.urllib import parse as urllib
 from django.utils.text import slugify
 from django.test import override_settings