Add license information

[vazhnov]

Hello!

I found this project from https://www.redhat.com/sysadmin/ansible-demo-lab

Could you please add information about license of this repository — is it allowed to copy, change and use code in any purpose?
It would be great to see any popular open source license.

[florianmoss]

Hi,

I'm not a maintainer nor involved with the creator, except that we both work for Red Hat - but since this project was created with the goal to promote Ansible and AT, I would say feel free to use the code!