Build failed. https://zuul.opendev.org/t/openstack/buildset/b147b2c1dc9a4dd281862772c0c091c4 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/02afffa79d2041ff89a37090f93d64e3 : FAILURE in 4m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/787139dcf4d34b94874f38e348100513 : SUCCESS in 4m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/bcb1ef38fae1482dbaf84c851edb4fb8 : SUCCESS in 4m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0f5073ac6b72446baeb7489793e32737 : SUCCESS in 4m 11s