Add parameter for neutron ml2 overlap_ip_version

[Feng Pan]

There is currently not a parameter to configure neutron ML2 overlay_ip_version option from T-H-T, so when we want to enable IPv6 vxlan tunnel endpoints, there is a configuration mismatch between Neutron server, which defaults overlay_ip_version to IPv4, and OVS agent, which configures an IPv6 endpoint address.

This parameter should be added to neutron-plugin-ml2 service so user can specify either IPv4 or IPv6 tunnel endpoints.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/466162

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/466162
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=5aa4eeba08acfa907333e2f129b85841890e7b7c
Submitter: Jenkins
Branch: master

commit 5aa4eeba08acfa907333e2f129b85841890e7b7c
Author: Feng Pan <email address hidden>
Date: Tue May 16 15:22:47 2017 -0400

    Add NeutronOverlayIPVersion parameter to neutron-plugins-ml2 service

    This patch adds NeutronOverlayIPVersion parameter to congfigure
    neutron ML2 overlay_ip_version option from T-H-T. puppet-neutron
    already has support for configuration of this option, we are just
    exposing it from T-H-T. This parameter needs to be set to '6' when
    IPv6 vxlan tunnel endpoints are desired.

    Closes-Bug: #1691213

    Change-Id: I056afa25f67a3b6857bdfef14e6d582b0a9e5e93
    Signed-off-by: Feng Pan <email address hidden>

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-heat-templates 7.0.0.0rc1 release candidate.