Build failed. https://zuul.opendev.org/t/openstack/buildset/886d970ee6de4f39b0b73e714018959d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9669ef622ab04bd59c0f9dcb557a183b : SUCCESS in 4m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b0e4796a0a994c9b8e49ee1bcfa1ad47 : SUCCESS in 5m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/23ac5c940fa2492d99a3eecf5ba33fcb : SUCCESS in 5m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f44cc2a263d747b89814edd952598889 : FAILURE in 3m 53s