Restart libvirtd after Nova Network install
Restart libvirtd after Nova Network install

Filters are not loaded if libvirtd is not restarted. This patch
is fixing this issue.

Change-Id: I3ba8e3c613b3c95c81f0b09417d952936d2e648f
Closes-bug: rhbz#1109362

imcsk8/packstack,openstack/packstack,fr34k8/packstack,openstack/packstack,stackforge/packstack,fr34k8/packstack,xbezdick/packstack,imcsk8/packstack,mahak/packstack,stackforge/packstack,palmer159/openstack-test,palmer159/openstack-test,xbezdick/packstack,xbezdick/packstack,mahak/packstack,mahak/packstack,openstack/packstack,fr34k8/packstack,stackforge/packstack,palmer159/openstack-test,imcsk8/packstack