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

Build failed. https://zuul.opendev.org/t/openstack/buildset/fc37980796394dc48447267d357b48... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c3d2627e52c9408dbdc05ad9efc453ea : SUCCESS in 3m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ca54489717fe4df089dd4405958e1c76 : FAILURE in 3m 10s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b32b81d0eaf848d68f35686549e5abab : SUCCESS in 3m 10s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/237c33a55f70494a91b2b4dbfc645c6a : FAILURE in 3m 43s