Move bash whitelisting to pep8 testenv
Move bash whitelisting to pep8 testenv

Change-Id: If2c3ebf57143cbed04b66a9986d67f91fee89630
Closes-Bug: #1302304

stackforge/networking-bigswitch,wolverineav/networking-bigswitch,stackforge/networking-bigswitch,openstack/networking-bigswitch,openstack/networking-bigswitch,wolverineav/networking-bigswitch