Allow the containerized compute node to spawn larger VMs
Allow the containerized compute node to spawn larger VMs

Atomic's root partition & logical volume defaults to 3G.
In order to launch larger VMs, we need to enlarge the root
logical volume and scale down the docker_pool logical volume.
We are allocating 80% of the disk space for vm data and the
remaining 20% for docker images.

Change-Id: If3fff78f476de23c7c51741a49bae227f2cdfe3e
Co-authored-by: Ian Main <87edab3227c32093d388ed00258c1a5e63cfd715@redhat.com>
Co-authored-by: Jeff Peeler <d776211e63e47e40d00501ffdb86a800e0782fea@redhat.com>

trozet/opnfv-tht,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,dprince/tripleo-heat-templates