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

Build failed. https://zuul.opendev.org/t/openstack/buildset/50587b76f84042928fa00d019984bc... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/18d2c4a12e7447bc85363b8e6632ddf7 : SUCCESS in 3m 57s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ca542d60ce1746d5aa6d2c0c42c6555b : SUCCESS in 3m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4d301759653c49fb861dd537574381fb : POST_FAILURE in 8m 10s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/849c6ec9f4554710bcc9924cd9b8bd7d : SUCCESS in 3m 50s