Changes imports order to pass H305, enables check

Changes imports order to pass H305 check with hacking 0.9.x
Removes H305 check from ignore line in tox.ini

Change-Id: I47bbe74f4178f46ea21fc37b69f53ea2d148a65e

oslo/config/generator.py

@@ -109,7 +109,7 @@ import sys
 import textwrap
 
 from oslo.config import cfg
-import stevedore.named
+import stevedore.named  # noqa
 
 LOG = logging.getLogger(__name__)
 

tests/test_cfg.py

@@ -22,12 +22,12 @@ import tempfile
 
 import fixtures
 import mock
+from oslotest import base
 import six
 from six import moves
 import testscenarios
 
 from oslo.config import cfg
-from oslotest import base
 
 load_tests = testscenarios.load_tests_apply_scenarios
 

tox.ini

@@ -24,6 +24,5 @@ commands = python setup.py build_sphinx
 
 [flake8]
 show-source = True
-ignore = H305
 exclude = .tox,dist,doc,*.egg,build
 builtins = _