Build failed. https://zuul.opendev.org/t/openstack/buildset/8bccc72c97334fd5a28ea6f381f18e29 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6e0d8a1dcd914367954a92a408efd0ed : SUCCESS in 4m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ead3d7b666484902951cc5e49c32baf9 : SUCCESS in 3m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5b7cbd0c7fc748de84e154c0998ca980 : SUCCESS in 2m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3ea649afe0354d53b0eb2b0d589af1ed : FAILURE in 2m 46s