Fix H102, H103 Apache 2.0 license hacking check error
Fix H102, H103 Apache 2.0 license hacking check error

Closes-Bug: #1209070

This commit addresses H102 and H103 hacking check.
  H102  Apache 2.0 license header not found
  H103  Header does not match Apache 2.0 License notice

Also ignores H233 hacking check in tox.ini.
  H233  Python 3.x incompatible use of print operator

Change-Id: I081964bf0b9e21614da2f146bd3ba8d28e211024

dougwig/x-neutron-vpnaas,openstack/neutron-vpnaas,citrix-openstack-build/neutron-vpnaas,openstack/neutron-vpnaas