Support both
[customizations]
hostname = "whatever"
and
[[customizations]]
hostname = "whatever"
in the blueprint data. The [[ syntax matches the other customization
directives (user, group, sshkey), and as such it's easy to accidentally
use it for the hostname without even realizing it's specifying something
different.
Add some tests for converting customizations to kickstarts.
This adds support for the optional blueprint section [customizations].
Use it like this:
[customizations]
hostname = yourhostnamehere
[[customiations.sshkey]]
user = root
key = root user key
