Update hacking to version 0.10

hacking 0.10 is required to not complain on the line
"from six.moves import range". Such line will be used to ease the
addition of Python 3 support to Congress.

Partially implements blueprint: support-python3
Change-Id: I5c927f6b4d2dab5f47ea347743aca3a6420325de

congress/dse/amqprouter.py

@@ -15,7 +15,7 @@
 import six
 
 
-class Node():
+class Node(object):
     def __init__(self, rPath=[], results=set()):
         self.destinations = set()
 

congress/tests/helper.py

@@ -324,6 +324,6 @@ class FakeRequest(object):
         self.body = json.dumps(body)
 
 
-class FakeServiceObj():
+class FakeServiceObj(object):
     def __init__(self):
         self.state = {}

test-requirements.txt

@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking<0.10,>=0.9.2
+hacking>=0.10.2,<0.11
 
 coverage>=3.6
 fixtures>=1.3.1