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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/005cbf512508467cb4730f6031e129af : SUCCESS in 10m 45s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e9b32b22f56144acabf7c3855d22bac9 : FAILURE in 4m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7716d2d7cd804a9eb134105bc01de1be : SUCCESS in 14m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2082e2e95b1a495b8f346aa796b86787 : SUCCESS in 12m 17s