Build failed. https://zuul.opendev.org/t/openstack/buildset/c80285e3a53646a99fbc180bc55495a8 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c75661370725441c96bcfc820d9b0092 : SUCCESS in 4m 45s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/99edce8e3e6c413385fc19a1c95117a0 : SUCCESS in 4m 24s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ac8c620435be4736ac412560c917c42e : SUCCESS in 5m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c90b71371ae141039cf7fb30a13c3e57 : FAILURE in 3m 43s