[RFE] (Operator-only) Add support 'snat' for loggable resource type

[Yushiro FURUKAWA]

This RFE adds support SNAT for loggable resource type. The purpose is to collect following logs for audit for cloud providers:

  * What did VM instance(local IP) use SNAT IP address ?
  * When used?

[Cao Xuan Hoang (hoangcx)]

Set status to Confirmed for corresponding to the tag set by amotoki :)

[Miguel Lavalle (minsel)]

We discussed this RFE during the Dublin PTG and we agreed to implement it. Please see the "API topics" section in the PTG summary: http://lists.openstack.org/pipermail/openstack-dev/2018-March/128183.html. As a consequence, moving this RFE to approved status. Please go ahead with the implementation

[Yushiro FURUKAWA (y-furukawa-2)]

Thanks a lot, Miguel!!!

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/564668

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/577086

[OpenStack Infra (hudson-openstack)]

Change abandoned by Slawek Kaplonski (<email address hidden>) on branch: master
Review: https://review.openstack.org/577086
Reason: This review is > 4 weeks without comment, and failed Jenkins the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Slawek Kaplonski (<email address hidden>) on branch: master
Review: https://review.openstack.org/564668
Reason: This review is > 4 weeks without comment, and failed Jenkins the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/604023

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/604969

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/605025

[OpenStack Infra (hudson-openstack)]

Change abandoned by Kim Bao Long (<email address hidden>) on branch: master
Review: https://review.openstack.org/605025

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/577086
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=6352b944a4dfa209e11f1981d9204aa89b9f157d
Submitter: Zuul
Branch: master

commit 6352b944a4dfa209e11f1981d9204aa89b9f157d
Author: Nguyen Phuong An <email address hidden>
Date: Thu Jun 21 14:40:57 2018 +0700

    Introduce L3 agent extension for SNAT logging

    This patch introduces SNAT logging extension for Neutron Packet Logging
    framework.

    Co-Authored-By: Kim Bao Long <email address hidden>
    Partial-Bug: #1752290
    Change-Id: I882b8e75525f51ef8b5b032fc89843ae904844e7

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/612612

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/564668
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=50c75e9e51a053c89a585c55a586ed3d931d82f1
Submitter: Zuul
Branch: master

commit 50c75e9e51a053c89a585c55a586ed3d931d82f1
Author: Nguyen Phuong An <email address hidden>
Date: Fri Apr 27 11:03:49 2018 +0700

    Add a request validator for SNAT logging

    A log request for SNAT resource should specify resource_type='snat'
    and resource_id=router_id. So this patch adds a validation method for
    the incoming log request.

    Co-Authored-By: Kim Bao Long <email address hidden>
    Change-Id: I4fff5a9c8877d192aab780eed9be90452711fb3d
    Partial-Bug: #1752290

[OpenStack Infra (hudson-openstack)]

Change abandoned by Kim Bao Long (<email address hidden>) on branch: master
Review: https://review.openstack.org/604969
Reason: Thanks yushiro!
This patch is not necessary any more due to our design has changed.

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Rodolfo Alonso <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/604023

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Rodolfo Alonso <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/568202

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Rodolfo Alonso <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/612612