Build failed. https://zuul.opendev.org/t/openstack/buildset/fd1a79847ad04c9cb5523523e38f0351 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bbda684af7c44ffb8c2c1e672069717a : SUCCESS in 4m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1e369d62f67b4b9f8f9ccf18178a6c68 : SUCCESS in 5m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e9643f25e73c4900a45613fc06fb4db7 : SUCCESS in 5m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5679c73df0bc4a6f828866aaf3124a7b : FAILURE in 5m 47s