neutron-tempest-plugin-scenario-linuxbridge jobs are broken on rocky/queens branches

[Bernard Cafarelli]

Sample rocky failure: https://review.opendev.org/#/c/757062/
neutron-tempest-plugin-scenario-linuxbridge-rocky ERROR Unable to find role in /var/lib/zuul/builds/c1394a26f4254553ad8253f923e9fe96/ansible/pre_playbook_3/role_0/neutron in 1m 12s

Sample queens failure: https://review.opendev.org/#/c/757063/
neutron-tempest-plugin-scenario-linuxbridge-queens ERROR Unable to find role in /var/lib/zuul/builds/c7ba6995cd1448d5be2fd0e2373d22e7/ansible/pre_playbook_3/role_0/neutron in 1m 05s

No additional log available sadly, and I do not see that failure on more recent branches

The job definition itself does not seem to have any specific roles, so I am not sure what changed (and broke)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/758377

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/758377
Committed: https://git.openstack.org/cgit/openstack/neutron-tempest-plugin/commit/?id=b1222e9fac8fdf55d6286c83409bc2678bde6319
Submitter: Zuul
Branch: master

commit b1222e9fac8fdf55d6286c83409bc2678bde6319
Author: Slawek Kaplonski <email address hidden>
Date: Thu Oct 15 11:35:35 2020 +0200

    Use different job definition for linuxbridge jobs runs on Xenial

    It seems that on Xenial nodes ansible still wants to include
    "legacy_ebtables" role which is only available in Neutron repo since
    stable/Victoria release.
    So lets try to use different job definition, not inherited from
    linuxbridge job for master branch for this job on Xenial nodes.

    This patch also switches back to use Cirros 0.3.5 (default in devstack)
    in stable/queens branch. It was switched to Cirros 0.5.1 in patch [1]
    but it seems that this new version of Cirros always has kernel
    panic when running on host with Ubuntu Xenial.

    [1] https://review.opendev.org/#/c/755112/

    Change-Id: I1ceb3a97d29600d8837611d714ff7df70c35fbd7
    Closes-Bug: #1899917

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron-tempest-plugin stein-last release.