Build failed. https://zuul.opendev.org/t/openstack/buildset/ef5c0aa7a06b4557b9e0e548f2c61475 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cf0fc2a9a495479391ab2d72a623119f : SUCCESS in 4m 19s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1fad399403fd482c8f9893b031996f43 : SUCCESS in 5m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8562450f2b5d49869a9afd0c58f06436 : FAILURE in 4m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/cc9b2ea0896d446aba0ab54e35318d9b : SUCCESS in 6m 15s