Build failed. https://zuul.opendev.org/t/openstack/buildset/4e13e493be604a0ba72eaf94fdefad8c - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ca0f82c4cbd34744ac80bff35943c351 : SUCCESS in 4m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/764c4cd1a8684756963e0543353f239c : SUCCESS in 4m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/79b400c4a531461cae0741144b22814c : SUCCESS in 2m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5aa215c3071f49a687a65884fe7af2bc : FAILURE in 5m 49s