Fixed service handling in specfile

After adding the libvirt-guests service into usual runlevels, we used
to start the libvirt-guests service. However this is usually not a
good practice. As mentioned on fedoraproject wiki, the installations
can be in changeroots, in an installer context, or in other situations
where we don't want the services autostarted.

libvirt.spec.in

@@ -1027,14 +1027,6 @@ fi
 %if %{with_systemd}
 %else
 /sbin/chkconfig --add libvirt-guests
-if [ $1 -ge 1 ]; then
-    level=$(/sbin/runlevel | /bin/cut -d ' ' -f 2)
-    if /sbin/chkconfig --levels $level libvirt-guests; then
-        # this doesn't do anything but allowing for libvirt-guests to be
-        # stopped on the first shutdown
-        /sbin/service libvirt-guests start > /dev/null 2>&1 || true
-    fi
-fi
 %endif
 
 %postun client -p /sbin/ldconfig