Fix auto_floating_ip parameter in nova_compute module does not work on RDO

* remote auto_floating_ip from create_sample_vm.yml
* add floating_ip_pools to create_sample_vm.yml

Closes-Bug: #19
Merge pull request #21 from josug-book1-materials/bug/19

Fix auto_floating_ip parameter in nova_compute module does not work on RDO