Build failed. https://zuul.opendev.org/t/openstack/buildset/febd01925191417693abb0bca67a6aeb - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ea1a251634ce49178e0ba30e6086da36 : SUCCESS in 4m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/64f2e13403364dfc9c1f8f8250bdaa7b : SUCCESS in 3m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5fca94541934414c880e53b6222c48f0 : FAILURE in 3m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/70309e8d23db4eed83c00082b6623026 : FAILURE in 7m 39s