Run libvirtd as root
Run libvirtd as root

Currently we are not creating any non-root user for running
libvirt daemon. That should be done in the future, but currently
when we don't have such a user, libvirtd should be runned by
root.

Change-Id: Ieb0d8bd068b591f522548628b0bfffbe206b749e
Related-Bug: #1523630

openstack/kolla,intel-onp/kolla,mandre/kolla,mandre/kolla,dardelean/kolla-ansible,rahulunair/kolla,limamauricio/mykolla,tonyli71/kolla,negronjl/kolla,mandre/kolla,toby82/kolla,limamauricio/mykolla,openstack/kolla,mrangana/kolla,GalenMa/kolla,negronjl/kolla,toby82/kolla,mrangana/kolla,dardelean/kolla-ansible,negronjl/kolla,limamauricio/mykolla,nihilifer/kolla,tonyli71/kolla,stackforge/kolla,coolsvap/kolla,nihilifer/kolla,toby82/kolla,coolsvap/kolla,dardelean/kolla-ansible,intel-onp/kolla,stackforge/kolla,GalenMa/kolla,rahulunair/kolla,coolsvap/kolla,stackforge/kolla