Build failed. https://zuul.opendev.org/t/openstack/buildset/08c4dd6c0a60448e90e0786d5fe2ec2d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a0351d96905e4e36ad2c20a4f5ecb764 : SUCCESS in 3m 29s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b0f369a8007140d2a1f7f18298269d05 : SUCCESS in 3m 47s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3e1abd2e4f79437582a63e0bf55697e9 : SUCCESS in 3m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0360ae4e23704be187c4fe5e8761fc15 : FAILURE in 4m 32s