dockerfile: ship qemu-kvm
dockerfile: ship qemu-kvm

qemu-kvm needs to be inside the container, otherwise it
cannot be docker exec'd.
Also, rebase on CentOS, so we know where the packages come from.

Change-Id: Ie01968ccccce869477a471416ed37657c2f1248b
Signed-off-by: Francesco Romani <c7100b580e6017ef67482ace46578cdd2d2e0dfe@redhat.com>

kubevirt/kubevirt,rmohr/kubevirt,fabiand/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,sungwonh/kubevirt,fabiand/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,mpolednik/kubevirt,kubevirt/kubevirt,admiyo/kubevirt,rmohr/kubevirt,davidvossel/kubevirt,admiyo/kubevirt,davidvossel/kubevirt,sungwonh/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,mpolednik/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt