Upgrade hacking to >=0.10.0

The current version of hacking is very old; upgrade hacking
and fix any minor errors that were uncovered.

Change-Id: Iabf38881b6030dce903c8e74670bfd6e5eabbc20

oslo_policy/opts.py

@@ -21,6 +21,7 @@ from oslo_policy import policy
 
 def list_opts():
     """Return a list of oslo.config options available in the library.
+
     The returned list includes all oslo.config options which may be registered
     at runtime by the library.
     Each element of the list is a tuple. The first element is the name of the
@@ -31,6 +32,8 @@ def list_opts():
     under the 'oslo.config.opts' namespace.
     The purpose of this is to allow tools like the Oslo sample config file
     generator to discover the options exposed to users by this library.
+
     :returns: a list of (group_name, opts) tuples
     """
+
     return [('oslo_policy', copy.deepcopy(policy._opts))]

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=0.5.6,<0.8
+hacking>=0.10.0,<0.11
 oslotest
 
 # These are needed for docs generation

tox.ini

@@ -30,10 +30,9 @@ commands = python setup.py testr --coverage
 
 [flake8]
 # H803 skipped on purpose per list discussion.
-# E123, E125 skipped as they are invalid PEP-8.
 
 show-source = True
-ignore = E123,E125,H803
+ignore = H803
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build