Change-Id: Ibd81408c806b70e6ed0b90e32efcd4a35d957935

This patch adds experimental functionallity to enroll baremetal nodes
into Ironic using Kayobe via a new playbook 'baremetal-compute-register.yml'
and adds 'kayobe baremetal compute register' into the Kayobe CLI.

Depends-On: I719fc8042742fe8b3b0312658aec39317a1bc358
Change-Id: I988b082b539acfc2710d42e89bcac5b7a1eb526a