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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/99dc03103c40494a827f7ff7ed5e88a7 : FAILURE in 4m 58s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9ea33f337cb9407f810801ebe808d0e4 : SUCCESS in 5m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/42309f4c62dc43b3a9b4b1699fa0455a : SUCCESS in 5m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/01a38edd8a8b4bc18065c03c3dbe0ba2 : SUCCESS in 4m 34s