This change allows you to define additional VMs to deploy
on the seed-hypervisor.

Co-authored-by: Piotr Parczewski <piotr@stackhpc.com>
Co-authored-by: Will Szumski <will@stackhpc.com>
Co-authored-by: Mark Goddard <mark@stackhpc.com>
Story: 2008741
Task: 42095
Change-Id: I8055fc5eb0a9edadcb35767303c659922f2d07ca