Build failed. https://zuul.opendev.org/t/openstack/buildset/f0473c5160d04bbd96ef18e5d7c06d1e - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/80dee7038e6740be83add88e0a6f6acb : SUCCESS in 4m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c1cda136314245fba1f4da4e3fe7a461 : SUCCESS in 4m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/95abf98fc00c443386ba91e707ce0e8b : FAILURE in 4m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4e7e8f95a8d043f5b4f13d4ca55bd809 : FAILURE in 3m 28s