Build failed. https://zuul.opendev.org/t/openstack/buildset/e6e59c2b546e44b89f687f10228857a0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/da5ae112a1804e7c9926c61d4512c60a : SUCCESS in 8m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e3af28051cb9437d873dcdd1f439f18a : SUCCESS in 5m 48s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7af94777cd4b4c3f81646046e7d8b252 : SUCCESS in 4m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6979f74e3f4b47ada7a3c14d737b172f : FAILURE in 4m 51s