Add license header
Add license header

While not strictly containing code (yet), add
a license header anyway to satisfy hacking check.

Change-Id: I9dc5b379bdf1c1307d72cd128f2a0be86ecd733f

naterh/ironic,NaohiroTamura/ironic,pshchelo/ironic,openstack/ironic,Tan0/ironic,openstack/ironic,rackerlabs/ironic,NaohiroTamura/ironic,naototty/vagrant-lxc-ironic,dims/ironic,citrix-openstack-build/ironic,redhat-openstack/ironic,ramineni/myironic,froyobin/ironic,rdo-management/ironic,bacaldwell/ironic,supermari0/ironic,hpproliant/ironic,SauloAislan/ironic,pshchelo/ironic,SauloAislan/ironic,devananda/ironic,dims/ironic,varunarya10/ironic,JioCloud/ironic,debayanray/ironic_backup,bacaldwell/ironic,ionutbalutoiu/ironic,faizan-barmawer/openstack_ironic,citrix-openstack-build/ironic,naototty/vagrant-lxc-ironic,ionutbalutoiu/ironic,Tehsmash/ironic