Break after the first equals result_value to avoid duplicates

[gkorland]

ref freestrings#93
freestrings#92
fix RedisJSON/RedisJSON#667

[oshadmi]

Can use a label to break from the outer loop to get to the next rel_value?

'outer: for map_value in map.values() {
    for result_value in &ret {
        if map_value.eq(*result_value) {
            tmp.push(*rel_value);
            break 'outer;
        }
    }
}