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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/673970641516437da3cb2d7a050e41af : SUCCESS in 9m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7af2971719ce4ade9130c762cd004604 : FAILURE in 5m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/39d0d5e046754676aaeb7c45baae640e : SUCCESS in 22m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/cbdbcdf8a58a42a194d262674521c7bd : SUCCESS in 18m 18s