static String[] getSlobrokConnectionSpecs(Slobrok slobrok) {
        String[] connectionSpecs = new String[1];
        connectionSpecs[0] = "tcp/localhost:" + slobrok.port();
        return connectionSpecs;
    }
Creates dummy vds nodes for the list of configured nodes and returns them.
As two dummy nodes are created for each configured node - one distributor and one storage node -
the returned list is twice as large as configuredNodes.
clustercontroller-core/src/test/java/com/yahoo/vespa/clustercontroller/core/FleetControllerTest.java