Build failed. https://zuul.opendev.org/t/openstack/buildset/a9c64c2cdff54b99ba21bd00dcfc3255 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/98eec5bf62b04aee946daa0364f290a9 : SUCCESS in 4m 58s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/bd6020df4c7346e088cbd1902f6978d4 : SUCCESS in 4m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cc80760231c94037aa2c1e7a84c39791 : SUCCESS in 4m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7923f9d8d6b3477180786e94db38066c : FAILURE in 3m 35s