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

Build failed. https://zuul.opendev.org/t/openstack/buildset/0620d964e51f4b92b776ccbbffc969... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4163cfa7fa964467a5eecde2a69e7874 : SUCCESS in 5m 44s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/42f9da20fc2e41a1b84fa3be80d233ba : SUCCESS in 16m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9307335e89984996a95f186ab9244bf6 : SUCCESS in 13m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/28db034c00e44c84a8960f69c037648c : FAILURE in 13m 04s