[cern] Allow OS magnum admin to get cluster certificate
Closes: https://gitlab.cern.ch/kubernetes/project/-/issues/153 Change-Id: Ibc02c96e94be33e4329fc71a382d3bb1e953f96b
Closes: https://gitlab.cern.ch/kubernetes/project/-/issues/153 Change-Id: Ibc02c96e94be33e4329fc71a382d3bb1e953f96b