Fixes Lulu link for the Operations book.
Fixes Lulu link for the Operations book.

Change-Id: Ie46a8a84bbc1f7de7ee650280cad25d6e73b4843

saeki-masaki/openstack-manuals,kairoaraujo/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,gongysh2004/openstack-manual,saeki-masaki/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,gongysh2004/openstack-manual,Akasurde/openstack-manuals