Build failed. https://zuul.opendev.org/t/openstack/buildset/507cdff276fb4519b8703be7d0ff28ff - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2cdc76ddb4924bb98c39748953702125 : SUCCESS in 4m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/84394541086443f4ab148d6365498103 : SUCCESS in 4m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8a0d02e067a24adcb1ae8b1c208d1591 : FAILURE in 4m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6a628d81467d4caca4af8ac707beb0c9 : FAILURE in 4m 50s