title: how to map hive to elastic search _id field
body: <p>I want to map hive key value to elastic search _id field.</p>
  
  <p>Example:</p>
  
  <pre><code>CREATE EXTERNAL TABLE test (id BIGINT ,name string,dept string) 
  STORED BY 'org.elasticsearch.hadoop.hive.EsStorageHandler' TBLPROPERTIES('es.resource' = 'hive/test','es.id.field' = 'id');
  </code></pre>
  
  <p>while am inserting record and checking elastic search it show below </p>
  
  <pre><code>{
      "_index": "hive",
      "_type": "extest",
      "_id": "AU6qODiDNN1Z0nJPsoXP",
      "_score": 1,
      "_source": {
          "id": 1,
          "name": "alex",
          "dept": "bigdata"
      }
  </code></pre>
  
  <p><code>"id": 1</code> and  <code>"_id": "AU6qODiDNN1Z0nJPsoXP"</code> both are not sync up. I want to sync up both the values.</p>