Build failed. https://zuul.opendev.org/t/openstack/buildset/56bc5facd63c44f4a6f32965b9f35869 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fe6170d3737d4370a748b075effd555f : SUCCESS in 3m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/bff3f913ed3e444e841c14de0ae484bb : SUCCESS in 5m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5a4516d4335c4b418f7e90b7009b424d : FAILURE in 3m 11s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6fa79f114f644ef49bade41462301541 : FAILURE in 2m 53s