tests: use urllib from six (#36515)

tests/test_api.py

@@ -9,13 +9,13 @@ import base64
 import hashlib
 import mock
 import re
-import urllib
 import datetime
 import time
 import json
 import sys
 
 from django.utils.six import StringIO
+from django.utils.six.moves.urllib import parse as urllib
 from django.utils.six.moves.urllib import parse as urlparse
 
 from quixote import cleanup, get_publisher

tests/test_backoffice_pages.py

@@ -7,7 +7,6 @@ import shutil
 import time
 import hashlib
 import random
-import urllib
 import xml.etree.ElementTree as ET
 import zipfile
 
@@ -20,6 +19,7 @@ except ImportError:
     xlwt = None
 
 from django.utils.six import StringIO, BytesIO
+from django.utils.six.moves.urllib import parse as urllib
 from django.utils.six.moves.urllib import parse as urlparse
 
 from quixote import cleanup, get_publisher