Build failed. https://zuul.opendev.org/t/openstack/buildset/c88105f76d734df4bc9bcf3b6f3c0092 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4489ce0f48c1409f96e83aa3b05f7f9c : SUCCESS in 3m 40s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9b2568dc403848dd9d3899fec0abf20e : SUCCESS in 4m 10s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/db2cff2cbe4849b5b81412607a5674a4 : SUCCESS in 3m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0f35a5f4a0b94464b402fe2bb30197b5 : FAILURE in 3m 29s