Disable libvirt NUMA topology support if libvirt < 1.0.4

If you're not at a new enough version of libvirt, the compute service
fails on startup because VirtNUMATopologyCellUsage is not fully
populated.

This add a min version check before trying to get host NUMA topology
information.

Closes-Bug: #1376307

Change-Id: I00f6325cb554bc5e34d9f0fe651af39630f35b5d