virt: Add OpenSUSE 12.3 x86_64 config.

Signed-off-by: Chris Evich <cevich@redhat.com>
virt: Fix legacy driver_type 'kvm' use

* Get rid of old virt-test reference to 'kvm' driver_type
* virtnet style doesn't care about kvm vs qemu difference
* unattended_install uses it for both qemu and libvirt virt-test
* No other usage found for vm.driver_type sensitive to 'kvm' value

Signed-off-by: Chris Evich <cevich@redhat.com>