Build failed. https://zuul.opendev.org/t/openstack/buildset/ccc6e3cc7f2b477d97fe2f01fcc01010 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c4a86e7907194a8d8dc3cd328f8f7b70 : SUCCESS in 6m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7db8ed2f4fc54bdb84402c5edb06c2f9 : SUCCESS in 3m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/09922eadb4c74bdc97e102163c94927a : FAILURE in 4m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/01d56929eded406e85db959dc64a469f : FAILURE in 4m 10s