terraform and terraform-libvirt provider

mkisofs and libvirt are needed on the machine where terraform is running for

these plans to run properly.

On Debian based hosts there is an apparmor policy that missing that will cause

permission errors. To fix it you need to add the following to

`/etc/apparmor.d/abstractions/libvirt-qemu`. I've been putting it at the end

of the file and everything is fine.

You need to have a `node.tfvars` in the `nodes/` directory which has contents

like the following.

`libvirt_uri` is the connect string for libvirt and `admin_ssh_pubkey` is the

SSH pubkey that should be accepted for the root user.

`worker_count` is the number of Bamboo agents to provision.

You can also use the `volume_pool` variable to use a different volume pool.

Once that file is created you provision it via: