Build failed. https://zuul.opendev.org/t/openstack/buildset/220f9f9e74564a609bb282f70ad17976 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/42669c0577a54d85a1be73c5ea1a8f6a : SUCCESS in 4m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/76520067941646abad32c51ed605b13b : SUCCESS in 3m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b6b286c2c6d74ea681a4756336f5283a : FAILURE in 3m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9d0820b041034857b4dc1cf2f65ea6ff : FAILURE in 3m 49s