Build failed. https://zuul.opendev.org/t/openstack/buildset/8d360e4802b14fef8e1d22431e0c6895 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bb285c6d2f824e57ae2cac345fb96f81 : SUCCESS in 5m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d0af9b89ccf647949821ef5e17cc35fe : SUCCESS in 5m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c1c8457ea26643c7b3fde3ac3096932c : SUCCESS in 7m 27s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4f90ec78788747d79e71be79fb2ec852 : FAILURE in 5m 24s