Add license header to swagger.py
Add license header to swagger.py

We don't want anyone to think we're responsible for this awful, awful
code :)

Change-Id: I8d636098971d6bb89b835b866285d84a4c8d03fb
Closes-Bug: #1461607

eshijia/magnum,ffantast/magnum,Tennyson53/SUR,Alzon/SUR,hongbin/magnum,Alzon/SUR,ArchiFleKs/magnum,ChengTiesheng/magnum,hongbin/magnum,Tennyson53/magnum,sajuptpm/magnum,dimtruck/magnum,Tennyson53/SUR,LaynePeng/magnum,annegentle/magnum,mjbrewer/testindex,ddepaoli3/magnum,ArchiFleKs/magnum,annegentle/magnum,openstack/magnum,mjbrewer/testindex,Tennyson53/magnum,ramielrowe/magnum,paulczar/magnum,jay-lau/magnum,ChengTiesheng/magnum,mjbrewer/testindex,ddepaoli3/magnum,sajuptpm/magnum,ramielrowe/magnum,LaynePeng/magnum,eshijia/SUR,eshijia/SUR,openstack/magnum,eshijia/magnum,dimtruck/magnum,ffantast/magnum,paulczar/magnum