(RAZOR-145) Add dmidecode (and virt-what) to microkernel

Without this patch the microkernel doesn't report complete Facter data.
Specifically, DMI information such as the hardware manufacturer are not
completely available when the microkernel is booted.

This patch addresses the problem by adding dmidecode to the kickstart
configuration for the microkernel.

In addition, virt-what is added since this tool helps provide more
accurate virtualization fact support.