Build failed. https://zuul.opendev.org/t/openstack/buildset/4fe79d82ee044e50920addf3c2ef76fc - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/902c212ecffa47c1990f23bfb33bd04a : SUCCESS in 4m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/98c4ac61331149b492f0eb42aed1c9f8 : SUCCESS in 4m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a9d4ceeb6f154c79b40c2dfca1384274 : SUCCESS in 4m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4b263db3bef947359ba357b15caf86e3 : FAILURE in 3m 54s