Build failed. https://zuul.opendev.org/t/openstack/buildset/879bbebbb5a04539b8d2499c20872c18 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ee81533148ee4eb085e54ac00d1af9ab : SUCCESS in 4m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/091d1949705a4e93ba17c6244b3380ad : SUCCESS in 5m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/adc83611fbf248c1ab26746f7df0b10e : SUCCESS in 4m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/1648ed8bdf5f41f6bf1eef2628ae1008 : FAILURE in 4m 28s