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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bab00a67b0f1429d93000c94e01bbf15 : SUCCESS in 6m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/32690110aa5a439187278ac82172cc90 : SUCCESS in 6m 47s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6d35495412454563926f0ef8c60741b1 : POST_FAILURE in 6m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/41f1ccb503e7407685b70490c0e481bb : SUCCESS in 7m 07s