Build failed. https://zuul.opendev.org/t/openstack/buildset/fcbafd0ec45f4e2fa5ee20072d0bf39b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1eb21a557ec84ff68ea158c0a23284ea : SUCCESS in 6m 47s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3a872e29809e4d23a81c1f290613ddad : SUCCESS in 4m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/930245917d8044a38b2beeddb9c36840 : FAILURE in 4m 45s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/18ddad639394478c81efcfce520680a9 : FAILURE in 4m 23s