change hacking requirements and fix hacking problems

Change-Id: I3dcdc9630a60b6ef550530cc729f846605a1ec44

openstack/tests/unit/test_resource.py

@@ -1161,7 +1161,7 @@ class ResourceMapping(base.TestCase):
         self._test_resource_serialization("patch", "update_by_id")
 
 
-class FakeResponse:
+class FakeResponse(object):
     def __init__(self, response):
         self.body = response
 

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>=0.9.2,<0.10
+hacking>=0.10.0,<0.11
 
 coverage>=3.6
 discover