Build failed. https://zuul.opendev.org/t/openstack/buildset/8226ab1d8a5b48638f8c7c51ab60006a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/439f8e768a954b28b326117e70795b74 : FAILURE in 3m 40s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4dfeba68475f402daf324e73decdc436 : SUCCESS in 5m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cfbc79ac7cb248f1a2de0196c2e72165 : SUCCESS in 3m 00s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e37d01a1826f4de5a2825e7b8f099d88 : SUCCESS in 3m 24s