static int truncateTo4SignificantBits(int i) {
        if (i == Integer.MIN_VALUE) return i;
        if (i < 0) return -truncateTo4SignificantBits(-i);
        if (i <= 16) return i;
        int mask = Integer.highestOneBit(i);
        mask += mask - (mask >> 3);
        return i & mask;
    }
Create list of endpoints, these will be consumed later by LbServicesProducer
config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainerCluster.java