Floating IP QoS scenario tests failing

[Slawek Kaplonski]

In stable/queens branch it looks that for some reason fip_qos L3 extension driver is not loaded and QoS for floating IP doesn't work in scenario tests.
That makes failing scenario tests for stable/queens branch, like for example here: http://logs.openstack.org/59/554859/1/check/neutron-tempest-plugin-scenario-linuxbridge/b02500e/logs/testr_results.html.gz

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/queens
Review: https://review.openstack.org/555263

[Slawek Kaplonski (slaweq)]

So this problem is happening in both linuxbridge and dvr scenario jobs.
For Linuxbridge it is problem only in stable/queens and patch https://review.openstack.org/555263 should fix it but for dvr job it looks that problem exists even in master, see: http://logs.openstack.org/46/552846/15/check/neutron-tempest-plugin-dvr-multinode-scenario/69f1136/logs/testr_results.html.gz or http://logs.openstack.org/97/554697/1/check/neutron-tempest-plugin-dvr-multinode-scenario/9ef7e76/logs/testr_results.html.gz

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/555263
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=269289594e3d9cc6d5c551ce30e79cd3ca9c9dac
Submitter: Zuul
Branch: stable/queens

commit 269289594e3d9cc6d5c551ce30e79cd3ca9c9dac
Author: LIU Yulong <email address hidden>
Date: Fri Feb 23 14:00:08 2018 +0800

    Try to enable L3 agent extension `fip_qos`

    Adds devstack configs to try to enable the L3 agent
    extension `fip_qos` by checking the API service
    extension router, agent and QoS.

    Once this L3 agent extension works during the devstack
    zuul job installation, we can continue to run the
    neutron-tempest-plugin tests for floating IP QoS.

    This cherry-pick closes related bug in stable/queens
    for linuxbridge scenario job.
    In master branch there is no this problem in linuxbridge
    scenario job as fip_qos L3 extension is already properly
    configured and QoS for Floating IPs works properly.

    Partially-Implements blueprint: floating-ip-rate-limit

    Related-Bug: #1758033

    Change-Id: Ibef48e7842a276fe77c901403d67760871f2b7e0
    (cherry picked from commit 6e50a77fc7412b2d0f5c6cf36c147d649cfb16a9)

[LIU Yulong (dragon889)]

Fix Released in neutron-12.0.1:
https://github.com/openstack/neutron/commits/12.0.1