Some Python/ssl module versions incorrectly initialize hashlib, causing weird...

Some Python/ssl module versions incorrectly initialize hashlib, causing weird openssl errors. Importing hashlib explicitly helps.

warden3/warden_client/warden_client.py

@@ -4,6 +4,7 @@
 # Copyright (C) 2011-2015 Cesnet z.s.p.o
 # Use of this source is governed by a 3-clause BSD-style license, see LICENSE file.
 
+import hashlib  # Some Python/ssl versions incorrectly initialize hashes, this helps
 import json, httplib, ssl, socket, logging, logging.handlers, time
 from urlparse import urlparse
 from urllib import urlencode