@Override
            public List<DummyVdsNode> getDummyNodes() { return nodes; }
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