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

Build failed. https://zuul.opendev.org/t/openstack/buildset/8c35be87288b4f1aa5151c37c5bbe3... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c3fc8ab1848249ee9cc0346f4e568e6f : SUCCESS in 12m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/53c0ef6ac27e4b4baf7b1407ed8c2255 : SUCCESS in 16m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/28eb9836f8974773881a6448a8d7cd92 : TIMED_OUT in 40m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b4c5a902675541669fe1712aaaf777ce : TIMED_OUT in 40m 53s