Build failed. https://zuul.opendev.org/t/openstack/buildset/54c9f1ec43d2433f9d6db1b49188eaa3 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/28b7d8b8b65d41b3bffc84b34c57a2cd : SUCCESS in 4m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1c3e037a658e491c8f83fab3f8332a70 : SUCCESS in 3m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8ed631da6480473fac5d1b942a0ecdc3 : FAILURE in 3m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0374c46fe32c4fb49e2982d2405d8ef7 : FAILURE in 4m 57s