Feature to specify ES pipeline for a given spreadsheet

[octavioranieri]

From #83
Implemented and tested, both web interface and CLI.

How to use it:

1-Create a ingest pipeline in your Elasticsearch:
Using Kibana:

PUT /_ingest/pipeline/pipeline-client-geolocation
{
  "processors": [
    {
      "uppercase": {
        "field": "country"
      }
    },
    {
      "geoip": {
        "field": "client_ip"
      }
    }
  ]
}

or cURL:

curl -XPUT "http://elasticsearch:9200/_ingest/pipeline/pipeline-client-geolocation" -H 'Content-Type: application/json' -d'{  "processors": [    {      "uppercase": {        "field": "country"      }    },    {      "geoip": {        "field": "client_ip"      }    }  ]}'

2- Specify pipeline name using web interface:

Or using CLI:

java -jar ./excelastic-1.3.7.jar ./sample.xlsx clients --pipeline pipeline-client-geolocation

Sample with dummy data: sample.xlsx

3-Results of GET clients/_search:

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "clients",
        "_type" : "default",
        "_id" : "FSK5pG4BQ_0-LmAn-QXS",
        "_score" : 1.0,
        "_source" : {
          "country" : "BRAZIL",
          "geoip" : {
            "continent_name" : "North America",
            "country_iso_code" : "US",
            "location" : {
              "lon" : -97.822,
              "lat" : 37.751
            }
          },
          "client_ip" : "8.8.8.8"
        }
      },
      {
        "_index" : "clients",
        "_type" : "default",
        "_id" : "FiK5pG4BQ_0-LmAn-QXS",
        "_score" : 1.0,
        "_source" : {
          "country" : "CANADA",
          "geoip" : {
            "continent_name" : "Oceania",
            "country_iso_code" : "AU",
            "location" : {
              "lon" : 143.2104,
              "lat" : -33.494
            }
          },
          "client_ip" : "1.1.1.1"
        }
      }
    ]
  }
}

If no pipeline is specified, import will proceed normally.