public static NodeCandidate createNewChild(NodeResources resources,
                                               NodeResources freeParentCapacity,
                                               Node parent,
                                               boolean violatesSpares,
                                               LockedNodeList allNodes,
                                               IP.Allocation.Context ipAllocationContext) {
        return new VirtualNodeCandidate(resources, freeParentCapacity, parent, violatesSpares, true, false, allNodes, ipAllocationContext);
    }
Returns the host priority, based on allocation skew, of this compared to other
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/NodeCandidate.java