Fix helper function to work with non-root
Fix helper function to work with non-root

Parsing domain from /etc/libvirt/qemu/* doesn't work
in case of non-root. Use of virsh is more general.

Signed-off-by: L. Pivarc <20641f57cb8ae0a0c0cb8324c56aa3e53fb301f0@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt