[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/ed0d393e4e3543f29d6ba510211b2254 : SUCCESS in 9m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ff7ca64661db4d9a90b3a6bd26c5ce10 : FAILURE in 4m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8f135eb65bca4585bf3b925d81cd0b4f : SUCCESS in 12m 20s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2dc9861c7ef54410ac5e37fff960a8d7 : SUCCESS in 17m 06s