Adds a pep8 target to tox.ini
Adds a pep8 target to tox.ini

The will now run flake8 on all Python files and bashate on all shell
scripts. Right now I'm ignoring the bashate errors, since there were so
many of them. Follow up patches will start fixing those issues.

A few Python files had minor modifications to pass flake8.

Change-Id: I5f773eb6ea9f1311aa045951ff9bdad16cca6491

michaelgugino/openstack-ansible-os_neutron,michaelgugino/openstack-ansible-os_neutron