Hello!

I'm getting huge numbers as result in SUM aggregations in Kibana, for example, in a SUM aggregation that the result wold be 0, in kibana visualization (data table visualization) i'm getting the number 2.3283064365386963E-10, that is 0.00000000023283064365.

I have already formated the number field at the index pattern to 0.0,[00], but the result in SUM aggregations seems to not respect this format.

May you guys know if we can fromat the SUM aggregations format to 2 decimal places?

Steps to reproduce:

```
PUT teste_indice_sum
{
"settings": {
"number_of_shards": 1
},
"mappings" : {
"properties" : {
"teste.calc" : { "type" : "scaled_float", "scaling_factor": 100 }
}
}
}
PUT teste_indice_sum/_doc/1
{
"teste.calc": 0
}
PUT teste_indice_sum/_doc/2
{
"teste.calc": 18382.26
}
PUT teste_indice_sum/_doc/3
{
"teste.calc": -808560.25
}
PUT teste_indice_sum/_doc/4
{
"teste.calc": 131606.72
}
PUT teste_indice_sum/_doc/5
{
"teste.calc": 5576474.22
}
PUT teste_indice_sum/_doc/6
{
"teste.calc": -110617.43
}
PUT teste_indice_sum/_doc/7
{
"teste.calc": 14002.85
}
PUT teste_indice_sum/_doc/8
{
"teste.calc": -136577.68
}
PUT teste_indice_sum/_doc/9
{
"teste.calc": 104506.85
}
PUT teste_indice_sum/_doc/10
{
"teste.calc": -4357917.55
}
PUT teste_indice_sum/_doc/11
{
"teste.calc": -431299.99
}
PUT teste_indice_sum/_doc/12
{
"teste.calc": 0
}
```

Thanks in advance!