Fixes Travis failure for python3.X

Author: ebozduman

tests/functional/tests.py

@@ -1452,7 +1452,7 @@ def get_policy_actions(stat):
     return actions
 
 def policy_validated(client, bucket_name, policy):
-    policy_dict = json.loads(client.get_bucket_policy(bucket_name))
+    policy_dict = json.loads(client.get_bucket_policy(bucket_name).decode("utf-8"))
     actions = get_policy_actions(policy_dict.get('Statement'))
     actions.sort()
     expected_actions = get_policy_actions(policy.get('Statement'))