Fix flake8 violation in conf.py

Change-Id: Ibc55f16f8a0426eb6f8f8c5fe10f360fe3f67e4f
(cherry picked from commit 72cbd94064)

doc/source/conf.py

@@ -1,22 +1,17 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
+# Copyright 2016, Rackspace US, Inc.
 #
-# openstack-ansible documentation build configuration file, created by
-# sphinx-quickstart on Mon Apr 13 20:42:26 2015.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# This file is execfile()d with the current directory set to its
-# containing dir.
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
-# Note that not all possible configuration values are present in this
-# autogenerated file.
-#
-# All configuration values have a default; values that are commented out
-# serve to show the default.
-
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-# sys.path.insert(0, os.path.abspath('.'))
+# Unless required by applicable law or agreed to in writing, software
+# 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.
 
 # -- General configuration ------------------------------------------------
 
@@ -32,7 +27,9 @@ extensions = [
 ]
 
 # The link to the browsable source code (for the left hand menu)
-oslosphinx_cgit_link = 'http://git.openstack.org/cgit/openstack/openstack-ansible-security'
+oslosphinx_cgit_link = (
+    'http://git.openstack.org/cgit/openstack/openstack-ansible-security'
+)
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']