Build failed. https://zuul.opendev.org/t/openstack/buildset/cc2b22aeece24002847730cacd04f8a4 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e6e6c40da84b43b2b20a5d71a1f96d6b : FAILURE in 4m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/839f423b3a0e48fbadcf6286657fd9b4 : FAILURE in 4m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7a47e137913847fdbda25aeaffd39c95 : FAILURE in 4m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/801db8d93584427fa4073035d8ec8523 : FAILURE in 5m 30s