fix issuse https://github.com/NLPchina/elasticsearch-sql/issues/265#i…

[allwefantasy]

Fix Issue :

https://github.com/NLPchina/elasticsearch-sql/issues/265#issuecomment-242388650

Unit test

org.nlpcn.es4sql.SqlParserTests.aggFieldWithAliasTableAliasShouldBeRemoved

Example

select count(t.*) as counts,sum(t.size) from xxx/locs as t group by t.kk

will be translate to

{
  "from" : 0,
  "size" : 0,
  "_source" : {
    "includes" : [ "COUNT", "SUM" ],
    "excludes" : [ ]
  },
  "aggregations" : {
    "kk" : {
      "terms" : {
        "field" : "kk",
        "size" : 200
      },
      "aggregations" : {
        "counts" : {
          "value_count" : {
            "field" : "_index"
          }
        },
        "SUM(size)" : {
          "sum" : {
            "field" : "size"
          }
        }
      }
    }
  }
}

[satapsa]

what will be the sql plugin version for this ?

[allwefantasy]

version 2.3.5. But my pr is merged to master.