Build failed. https://zuul.opendev.org/t/openstack/buildset/c67271f5aeb943d7a13ad500cc2ff564 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a91e4abe34c14cb4a5e29646d9f04e80 : SUCCESS in 4m 22s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2ac8f57bac114e4694508e111b95ea61 : SUCCESS in 3m 24s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4d51a312e93443efae90e9157588b17a : FAILURE in 3m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/52c4964de88842e1849012dd7847e480 : FAILURE in 3m 34s