Build failed. https://zuul.opendev.org/t/openstack/buildset/4540c04bb0b24e27ba73cb8109295d82 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/83200be1c9504270a63eda62a4d219d0 : SUCCESS in 3m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7a2c0b491dd5400d98ba4f7d0c463a5e : FAILURE in 3m 37s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/75ce1d986d014b7eb5cd62f6d68f4a57 : SUCCESS in 3m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/44322d16c1e44bf3929cc373006fe6bb : SUCCESS in 3m 12s