Build failed. https://zuul.opendev.org/t/openstack/buildset/00cfb462da4547b49bdcee1f6e80133a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1308062f43a64866bb395c93a3dc6438 : SUCCESS in 3m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/261c221f66cb4ec2ab47a27b7f293716 : SUCCESS in 3m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2ea33924a54f476b8a1b59f9ad78926f : FAILURE in 3m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/09061e12cccb402fa091a3c04afad3d8 : FAILURE in 3m 40s