Example layer 3 routed environment configuration limits VIP to POD1

- [x] This doc is inaccurate in this way:

The lb_vip_address is defined as 172.29.236.9. The POD1 management network is 172.29.236.0/24.

Therefore, I don't think it is possible for the vip to be served by services running on the other two infra nodes in the 239 and 242 sub-nets as it can't float into those network ranges.

I'm not sure that the proposed network setup works with haproxy as deployed by OSA - it may imply an external load balancer. If this is the case the docs/config should be amended to detail this.

-----------------------------------
Release: 16.0.1.dev3 on 2017-09-14 21:37
SHA: f9aa9e3152947793dfdfbc5e0315ceb9f9fd6ef8
Source: https://git.openstack.org/cgit/openstack/openstack-ansible/tree/doc/source/app-config-pod.rst
URL: https://docs.openstack.org/project-deploy-guide/openstack-ansible/pike/app-config-pod.html