Pin pep8 to 1.3.3

pep8 1.3.3 is pretty much standard across the openstack
projects. Pin pep8 1.3.3 and fix associated warnings/errors.

Change-Id: I7230857889d261320a0dab2c261c9f85dc0ee602
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge "Pin pep8 to 1.3.3"