Build failed. https://zuul.opendev.org/t/openstack/buildset/28ba77cc394f41559e0f3f343b840ef2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/73fc0aa1b69e4fff8edf8d04ddbf929e : SUCCESS in 3m 34s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/84dfa50994cc4240824ea333b391450a : SUCCESS in 3m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/850ef22a18dd4922a73b201acfce68ea : SUCCESS in 2m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/978f4443112a4d67b67a24ff100bd801 : FAILURE in 2m 44s