libvirtd.socket does monitor libvirtd.service and trigger service restart
when it spot that service is down.
However in order to enable tcp and tls sockets, we need libvirt
to be stopped.
Currently race condition can happen, when we stop libvirt, but it's
started by socket before we enable tls one.
To overcome this we stop socket along with service.
Change-Id: Iacc093311036fb8d6559a0e32252579303a639ba
(cherry picked from commit a3c0edba564beff374e5074ed6a00170b350bf2b)
bd8c799a72