对text字段聚合，没有设置fielddate所以出错

http://192.168.60.26:9200/linewell_assets_mgt_es_yh_test/lw_devices/
_mapping
{
  "properties": {
    "country_value": {
             "type": "text",
             "fielddata": true
         },
         "pakc_value": {
             "type": "text",
             "fielddata": true
         }
  }
}