Cleanup - Fix the attributes that where not filled

[Bruno Costa]

If there are multiple records for the same id because of arrays in the results structure retrieved from the DB.

Iteration 1

{
   key: "value"
}

Iteration 1+1

{
   key: ""
}

Iteration n

{
   key: "key"
}

When this happens the values should be removed and leave an empty string "".

Should be done in the cleanup of the retrieved structure.

[Bruno Costa]

The specific problem discussed here was addressed the commit mentioned above