Build failed. https://zuul.opendev.org/t/openstack/buildset/96fd889c09e8487fa28a8137a199ef41 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fe762806cbf4492e9c3cceaf51063d76 : SUCCESS in 2m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8cc76d615b6e442abb01cc010e49907e : SUCCESS in 2m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/705eb6847fb84c4aa3c7d24a6332ccaa : SUCCESS in 3m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/166c3e2925a742459ea5e363fed61b43 : FAILURE in 2m 40s