Aggregations: histo "interval" should allow coercion from string

[clintongormley]

This fails with Unexpected token VALUE_STRING in aggregation [histo] because "50" is passed as a string:

curl -XGET 'http://localhost:9200/_search?pretty=1' -d '
{
   "aggs" : {
      "histo" : {
         "histogram" : {
            "interval" : "50",
            "field" : "number"
         }
      }
   }
}
'

Perl won't guarantee that a number is a number and not a string.

[colings86]

This is probably an issue for a lot of number fields in the aggregations. All will need to be checked for this

[s1monw]

I guess we should just check for:

            } else if (token == XContentParser.Token.VALUE_NUMBER || token == XContentParser.Token.VALUE_STRING) {

[kimchy]

yea, or just check if token.isValue and try and get the relevant type, the parsers will automatically convert strings to number if you ask for a long value