tox pep8 warns /bin/bash not installed in testenv

[Henry Gessau]

$ tox -e pep8
pep8 develop-inst-nodeps: /home/henry/Dev/neutron
pep8 runtests: commands[0] | flake8
pep8 runtests: commands[1] | neutron-db-manage check_migration
pep8 runtests: commands[2] | bash -c find neutron -type f -regex '.*\.pot?' -print0|xargs -0 -n 1 msgfmt --check-format -o /dev/null
WARNING:test command found but not installed in testenv
  cmd: /bin/bash
  env: /home/henry/Dev/neutron/.tox/pep8
Maybe forgot to specify a dependency?

This is due to the tox.ini changes in https://review.openstack.org/84234

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/85223

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/85223
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=b3d1fc88644b49c8660b3aac940288e46a328dcc
Submitter: Jenkins
Branch: master

commit b3d1fc88644b49c8660b3aac940288e46a328dcc
Author: Henry Gessau <email address hidden>
Date: Thu Apr 3 23:03:46 2014 -0400

    Move bash whitelisting to pep8 testenv

    Change-Id: If2c3ebf57143cbed04b66a9986d67f91fee89630
    Closes-Bug: #1302304