Start using hacking 0.6

So we can start using new hacking 0.6 checks.

Since hacking 0.6 pins pep8, pyflakes and flake8 they can be removed
from test-requires. For any unfixed checks list them in tox.ini

Fix a H103, 'Header does not match Apache 2.0 License notice' that
leaked in

Change-Id: I652fe3270f1c37afdd386bfae7c4b27b6abcfa06

nova/api/openstack/compute/plugins/v3/migrations.py

@@ -10,7 +10,7 @@
 #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
-#    under the License
+#    under the License.
 
 from nova.api.openstack import extensions
 from nova.api.openstack import wsgi

test-requirements.txt

@@ -1,9 +1,4 @@
-# Install bounded pep8/pyflakes first, then let flake8 install
+hacking>=0.5.6,<0.7
-pep8==1.4.5
-pyflakes==0.7.2
-flake8==2.0
-hacking>=0.5.3,<0.6
-
 coverage>=3.6
 discover
 feedparser

tox.ini

@@ -41,7 +41,13 @@ commands =
 commands = {posargs}
 
 [flake8]
-ignore = E121,E122,E123,E124,E126,E127,E128,E711,E712,H302,H303,H404,F403,F811,F841,N309
+# TODO Hacking 0.6 checks to fix
+# H102  Apache 2.0 license header not found
+# H232  Python 3.x incompatible octal 1 should be written as 0o1
+# H233  Python 3.x incompatible use of print operator
+# H501  Do not use locals() for string formatting
+
+ignore = E121,E122,E123,E124,E126,E127,E128,E711,E712,H102,H232,H233,H302,H303,H404,F403,H501,F811,F841,N309
 builtins = _
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,*plugins/xenserver*,tools