[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/175cd9200bd047afaa2167c9db38b3... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/70a21bb5b12945f4876a5fee23b1fc0b : FAILURE in 5m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/748fc25583964941b86404802d8720e1 : SUCCESS in 4m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/94668506fa454508b96fe8bc8729efe0 : SUCCESS in 5m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/477ba7e9fd4644c988430f002deef25c : SUCCESS in 5m 00s