private List<Host> createHosts(String vespaVersion) {
        return List.of(createHost("host1", vespaVersion), createHost("host2", vespaVersion), createHost("host3", vespaVersion));
    }
@author Ulf Lilleengen
@author Harald Musum
configserver/src/test/java/com/yahoo/vespa/config/server/ConfigServerBootstrapTest.java