Upgrade to Hacking 0.7

There was a bug in hacking 0.6 that broke H202, assertRaises Exception
too broad, so switch to Hacking 0.7 and fix the one H202 bug.

Change-Id: Ia3fb22d1524022479d7068cb84a3bdf7ca19f408

nova/tests/compute/test_compute_api.py

@@ -528,11 +528,11 @@ class _ComputeAPIUnitTestMixIn(object):
 
         db.block_device_mapping_get_all_by_instance(
             self.context, inst.uuid).AndReturn([])
-        inst.save().AndRaise(Exception)
+        inst.save().AndRaise(test.TestingException)
 
         self.mox.ReplayAll()
 
-        self.assertRaises(Exception,
+        self.assertRaises(test.TestingException,
                           self.compute_api.soft_delete, self.context, inst)
 
     def test_is_volume_backed_being_true_if_root_is_block_device(self):

test-requirements.txt

@@ -1,4 +1,4 @@
-hacking>=0.5.6,<0.7
+hacking>=0.5.6,<0.8
 coverage>=3.6
 discover
 feedparser