Update the iscsi demo README to use the libvirt-kubevirt image
Update the iscsi demo README to use the libvirt-kubevirt image

rmohr/kubevirt,fabiand/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,fabiand/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,rmohr/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt