Fix a part of python 3 tests (make tests-py3, see https://github.com/ansible/ansible/issues/13553 for more details).

lib/ansible/module_utils/known_hosts.py

@@ -28,7 +28,11 @@
 
 import os
 import hmac
+
+try:
     import urlparse
+except ImportError:
+    import urllib.parse as urlparse
 
 try:
     from hashlib import sha1