Build failed. https://zuul.opendev.org/t/openstack/buildset/13d6d2150d574b38b4cfb14b5234d0d8 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d3ae9072ae0149119a8c9a0cffb43cfc : FAILURE in 4m 34s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b7ee903facfd4f12819a10635cbdee50 : FAILURE in 4m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c5e119ec04f44ef6aab212ef02730a89 : FAILURE in 4m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/1ed0fb1d9f6141b4b1361bc7fc383277 : FAILURE in 4m 42s