Fix for bug 1111078, where PDFs are always returned by Google.
Fix for bug 1111078, where PDFs are always returned by Google.

Change-Id: I5acb114b1a4729c1d5b44d788b420d9fc2e85fd5

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