private boolean lessThanHalfTheHost(NodeCandidate node) {
        var n = node.resources();
        var h = node.parent.get().resources();
        if (h.vcpu()     < n.vcpu()     * 2) return false;
        if (h.memoryGiB() < n.memoryGiB() * 2) return false;
        if (h.diskGb()   < n.diskGb()   * 2) return false;
        return true;
    }
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