When uninstalling a cluster and only hidden servers are left, config-show can return a result set without ipa_master_server entry. Fixes: https://pagure.io/freeipa/issue/7892 Signed-off-by: Christian Heimes <cheimes@redhat.com> Reviewed-By: Francois Cami <fcami@redhat.com> Reviewed-By: Thomas Woerner <twoerner@redhat.com>