rdo periodic centos-7-ovb-3ctlr_1comp-featureset001-train fails tempest cant download cirros image

In [1] the periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp-featureset001-train failed during the tempest run with an error downloading the cirros image trace like

        2019-10-23 13:39:48.888940 | primary | 2019-10-23 13:22:05.964 316124 INFO config_tempest.constants [-] Creating image 'cirros-0.4.0-x86_64-disk.img'
        2019-10-23 13:39:48.889069 | primary | 2019-10-23 13:22:05.965 316124 INFO config_tempest.constants [-] Downloading 'http://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img' and saving as 'etc/cirros-0.4.0-x86_64-disk.img'
        2019-10-23 13:39:48.889144 | primary | 2019-10-23 13:39:48.650 316124 CRITICAL tempest [-] Unhandled error: error: [Errno 110] Connection timed out
        2019-10-23 13:39:48.889225 | primary | 20

This blocks train promotion and its likely there are many other jobs affected if this is a general problem

Related cirros bug filed at [2]

[1] http://logs.rdoproject.org/openstack-periodic-latest-released/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp-featureset001-train/786387e/job-output.txt
[2] https://bugs.launchpad.net/cirros/+bug/1849327