Build failed. https://zuul.opendev.org/t/openstack/buildset/93f2686bcf854884ba8e73598f5be3b0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/068df1591fd044b4a0da12672b6e0d1f : FAILURE in 4m 19s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7f4599f8d08342858a633bfcb663171d : FAILURE in 4m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f1e3110bc2c4456088fa975428640ae3 : FAILURE in 4m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fec25c4e477c486ebf2580506f13de3d : FAILURE in 4m 22s