private static String getImplicitAdminV2() {
        return "<admin version='2.0'>\n" +
               "  <adminserver hostalias='" + HostsXmlProvisioner.IMPLICIT_ADMIN_HOSTALIAS + "'/>\n" +
               "</admin>\n";
    }
Initialize part 2.:
Prepare all config models for starting. Must be called after plugins are loaded and frozen.
config-model/src/main/java/com/yahoo/config/model/ConfigModelRepo.java