payments: get urllib from six (#39924)

auquotidien/modules/payments.py

@@ -3,10 +3,11 @@ import string
 from datetime import datetime as dt
 import hashlib
 import time
-import urllib
 
 from decimal import Decimal
 
+from django.utils.six.moves.urllib import parse as urllib
+
 from quixote import (redirect, get_publisher, get_request, get_session,
         get_response)
 from quixote.directory import Directory