Comment 4 for bug 1676513

Reviewed: https://review.fuel-infra.org/32610
Submitter: Pkgs Jenkins <email address hidden>
Branch: 9.0/mitaka

Commit: 4ebe2fcd663e46c1cc584afd9bb015bf51f0fc37
Author: Vladik Romanovsky <email address hidden>
Date: Tue Apr 4 07:53:10 2017

neutron: retrieve physical network name from a multi-provider network

Multi-provider networks are a combination of vxlan and vlan networks.
such a network has a special "segments" field that holds a list
of networks. Each element of this list has the same structure as the 'provider
network attributes'.
These attributes are:
- provider:network_type
- provider:physical_network
- provider:segmentation_id

This patch will retrieve the relevant physical network name from a
multi-provider network

Change-Id: Icb9a546e6fcbf399fcef3e9ea686b35ec3817cd5
Closes-Bug: #1676513
(cherry picked from commit 5ae4f943d3d6b873210acbf2827d20d40b934164)