[TripleO] centos7 gate blocker (stable/train) please hold rechecks

Hello tripleo o/ new gate blocker for centos7 hitting stable/train tripleo repos https://zuul.opendev.org/t/openstack/builds?job_name=tripleo-ci-centos-7-con... bug is at https://bugs.launchpad.net/tripleo/+bug/1938079 - hitting stable/train (we only run c7 jobs there). investigation/resolution ongoing please hold rechecks for centos7 jobs. thank you