Build failed. https://zuul.opendev.org/t/openstack/buildset/ddcad98cc63e406fb3f5bebc6f5eb8cd - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e5f4e35c444a4e9eaa05f4cdd994c004 : SUCCESS in 2m 44s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1b8294d17d0f4be190945e90f6ef5551 : SUCCESS in 3m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a99315309d5141e19b41220ee841b30d : FAILURE in 2m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fe28f7b2005045aebed5a96b06c47830 : FAILURE in 3m 34s