Add B303 into list of skipped bandit plugins
Add B303 into list of skipped bandit plugins

Blacklist call of hashlib.sha1 was blacklisted in bandit
with [1] and it is now added to list of skipped tests in
Neutron Client.

[1] PyCQA/bandit@35e3544

Change-Id: I8322d0666528323df8b1214306be4b80c4b0777a

openstack/python-neutronclient,noironetworks/python-neutronclient,openstack/python-neutronclient,noironetworks/python-neutronclient