[Openstack-stable-maint] Stable check of openstack/keystone for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/b8e94a0d8b9c49f3bc41395bf3e950... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e156e2c2e30045018618b78d17fdfc8a : SUCCESS in 13m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a3f3782e5951460f804517e4244c12fe : SUCCESS in 12m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d02caef3ab3e4070982df3eb7264fa70 : FAILURE in 17m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7efbf058eec6435486596cf21c376a07 : SUCCESS in 15m 28s