Build failed. https://zuul.opendev.org/t/openstack/buildset/a078398234d94f569bfa8c62ac097f31 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3a1d4741b4034ac98e5ebef8f06b167a : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0522d8cb623248b6a763534269619a86 : SUCCESS in 3m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/95ff7606c496420cb88314614e3983f7 : FAILURE in 2m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0793775840df486389829c51aadeeafa : FAILURE in 3m 07s