Linked Neutron overview content in the Installation Guide
Linked Neutron overview content in the Installation Guide

'xi:include parse' the  neutron overview content in the OpenStack Networking section

backport: Juno
Closes-Bug: #1340524

Change-Id: Ifaf92418552396c992764cb55696da30dd654853

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