Add flake8 ignore list to fast8 script
Add flake8 ignore list to fast8 script

Without this patch, the fast8 tox environment runs flake8 differently
than the pep8 environment does, excluding the ignore list. This patch
ensures they have the same ignore list so that results are consistent.

Change-Id: I3f573e9627b17896fdd57261b9de692d49857140

openstack/keystone,mahak/keystone,mahak/keystone,openstack/keystone,mahak/keystone,openstack/keystone