Build failed. https://zuul.opendev.org/t/openstack/buildset/e3a20c28c7124c1b8d0b4caba6474181 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ec751eb7bc4740a4a070150a81d63911 : SUCCESS in 2m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0f68076750a04623a608bdc987792cb2 : SUCCESS in 4m 22s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f9aa816b3f094f9da2a925632695f7bc : SUCCESS in 3m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f18171310531436381935a2b27dd7614 : FAILURE in 2m 34s