Index Templates file is not being applied. ES [5.4.6]

[Zamir_Arif]

I have created a template as shown below.

GET /_template/
{
  "deal-expense-template": {
    "order": 0,
    "template": "[deal*]",
    "settings": {
      "index": {
        "number_of_shards": "5"
      }
    },
    "mappings": {
      "kafka-connect": {
        "properties": {
          "NO_OF_DEALS": {
            "type": "long"
          },
          "EXPENSE_CODE_DESCRIPTION": {
            "type": "keyword"
          },
          "EXPENSE_CODE": {
            "type": "keyword"
          }
        }
      }
    },
    "aliases": {}
  }
}

I am using Kafka Connect to write data to Elasticsearch which creates the following index.

GET /_all/_mapping

        {
      "deal-expense-new": {
        "mappings": {
          "kafka-connect": {
            "properties": {
              "EXPENSE_CODE": {
                "type": "text"
              },
              "EXPENSE_CODE_DESCRIPTION": {
                "type": "text"
              },
              "NO_OF_DEALS": {
                "type": "long"
              }
            }
          }
        }
      }

When Kafka writes it creates an index called deal-expense-new and template would have been applied.

I can find this in logs:

 [2018-06-13T15:23:37,901][INFO ][o.e.c.m.MetaDataCreateIndexService] [lrv141rq] [deal-expense-new] creating index, cause [api], templates [], shards [5]/[1], mappings []
[2018-06-13T15:23:38,214][INFO ][o.e.c.m.MetaDataMappingService] [lrv141rq] [deal-expense-new/lgsxUCd5THCDy9ykoMj5FA] create_mapping [kafka-connect]

Please let me know If I am doing anything wrong here.