Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2fff891f4b0943ae881994a227d329f3 : SUCCESS in 10m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f7d608949eb4462482f4929c73cb58a6 : SUCCESS in 6m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5ac952ac0f754414b96725c584072864 : SUCCESS in 6m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3eefcfac88f3499cb349d6124e8072d8 : FAILURE in 5m 35s