Train upgrades: periodic-tripleo-ci-centos-7-standalone-upgrade-train is failing - ERROR configuring swift_ringbuilder

periodic-tripleo-ci-centos-7-standalone-upgrade-train if failing consistently:

https://review.rdoproject.org/zuul/builds?job_name=periodic-tripleo-ci-centos-7-standalone-upgrade-train

Below is the full log of the standalone upgrade:

http://logs.rdoproject.org/openstack-periodic-latest-released/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-standalone-upgrade-train/851cf39/logs/undercloud/home/zuul/standalone_upgrade.log.txt.gz

At this point in the release, upgrades should be passing.

See errors in the log above include:

2019-11-01 12:50:02 | "2019-11-01 12:49:34,367 ERROR: 92987 -- ['/usr/bin/podman', 'run', '--user', 'root', '--name', u'container-puppet-neutron', '--env', u'PUPPET_TAGS=file,file_line,concat,augeas,cron,neutron_config,neutron_api_config,neutron_plugin_ml2,neutron_config,ovn_metadata_agent_config', '--env', u'NAME=neutron', '--env', u'HOSTNAME=standalone', '--env', 'NO_ARCHIVE=', '--env', 'STEP=6', '--env', 'NET_HOST=true', '--env', 'DEBUG=False', '--volume', '/etc/localtime:/etc/localtime:ro', '--volume', '/tmp/tmprKq9jP:/etc/config.pp:ro', '--volume', '/etc/puppet/:/tmp/puppet-etc/:ro', '--volume', '/etc/pki/ca-trust/extracted:/etc/pki/ca-trust/extracted:ro', '--volume', '/etc/pki/tls/certs/ca-bundle.crt:/etc/pki/tls/certs/ca-bundle.crt:ro', '--volume', '/etc/pki/tls/certs/ca-bundle.trust.crt:/etc/pki/tls/certs/ca-bundle.trust.crt:ro', '--volume', '/etc/pki/tls/cert.pem:/etc/pki/tls/cert.pem:ro', '--volume', '/var/lib/config-data:/var/lib/config-data/:rw', '--volume', '/var/lib/container-puppet/puppetlabs/facter.conf:/etc/puppetlabs/facter/facter.conf:ro', '--volume', '/var/lib/container-puppet/puppetlabs/:/opt/puppetlabs/:ro', '--volume', '/dev/log:/dev/log:rw', '--rm', '--log-driver', 'k8s-file', '--log-opt', u'path=/var/log/containers/stdouts/container-puppet-neutron.log', '--security-opt', 'label=disable', '--volume', '/usr/share/openstack-puppet/modules/:/usr/share/openstack-puppet/modules/:ro', '--volume', u'/lib/modules:/lib/modules:ro', '--volume', u'/run/openvswitch:/run/openvswitch:shared,z', '--entrypoint', '/var/lib/container-puppet/container-puppet.sh', '--net', 'host', '--volume', '/etc/hosts:/etc/hosts:ro', '--volume', '/var/lib/container-puppet/container-puppet.sh:/var/lib/container-puppet/container-puppet.sh:ro', u'trunk.registry.rdoproject.org/tripleotrain/centos-binary-neutron-server-

<snip>

2019-11-01 12:50:02 | "2019-11-01 12:49:59,428 INFO: 92987 -- Removing container: container-puppet-neutron",
2019-11-01 12:50:02 | "2019-11-01 12:49:59,675 INFO: 92987 -- Finished processing puppet configs for neutron",
2019-11-01 12:50:02 | "2019-11-01 12:49:59,678 ERROR: 92979 -- ERROR configuring swift_ringbuilder"
2019-11-01 12:50:02 | ]
2019-11-01 12:50:02 | }
2019-11-01 12:50:02 | ]
2019-11-01 12:50:02 | ]: DeploymentError: Deployment failed