Build failed. https://zuul.opendev.org/t/openstack/buildset/a745bc7d8a46412c95c893f39cfa1fa6 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/eee649806e8b430c86878f9586f138ea : SUCCESS in 4m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/11c4f6269b0c4aee995a780ff103b118 : SUCCESS in 4m 04s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/406c656878624792a2a32f07d398e4fd : SUCCESS in 3m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/843595548ed540fdb00ca68a74b13aa9 : FAILURE in 3m 39s