[Openstack-stable-maint] Stable check of openstack/neutron-fwaas for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/9329e150fc9849e8833e69f24f2f6f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6aa556fe0af04cd5a41384e04e6d852d : FAILURE in 4m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/86b5005f90ca42e08edf8b551f2303de : SUCCESS in 4m 48s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ffb1c1e89440478785929d97f0261b43 : SUCCESS in 4m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3065b667f5614f3fa6c34e103f552738 : SUCCESS in 5m 37s