Build failed. https://zuul.opendev.org/t/openstack/buildset/a28d64ebbaca4ed7a61e23e3b546042b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/99f53a6b33f64611a2dd99e2c80e8391 : SUCCESS in 2m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/79ff693f0e4648b98a04b20f717d4fc7 : SUCCESS in 2m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b810c228fdb441b5b73305957367fe79 : SUCCESS in 4m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f44bba0343034252a97974d729b4ac7a : FAILURE in 3m 36s