title: Convert array of json into single json with inner array
body: <p>I'm getting a message from a system in json format and want to perform a transformation in order to get below message</p>
  
  <p>Source message:</p>
  
  <pre><code>    [
  {
      "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": "2019-01-03T22:00:00",
      "BATCH_ID": 1812,
      "STORENUMBER": 1197,
      "PROCESS_STATUS": "P"
  },
  {
     "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": "2019-01-04T18:00:00",
      "BATCH_ID": 1812,
      "STORENUMBER": 1197,
      "PROCESS_STATUS": "P"
  },
  {
      "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": "2019-01-03T22:00:00",
      "BATCH_ID": 1314,
      "STORENUMBER": 1198,
      "PROCESS_STATUS": "P"
  },
  {
      "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": "2019-01-04T18:00:00",
      "BATCH_ID": 1314,
      "STORENUMBER": 1198,
      "PROCESS_STATUS": "P"
  }]
  </code></pre>
  
  <p>Expected Output</p>
  
  <pre><code>    [
  {
      "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": ["2019-01-03T22:00:00","2019-01-04T18:00:00"],
      "BATCH_ID": 1812,
      "STORENUMBER": 1197,
      "PROCESS_STATUS": "P"
  },
  {
     "OPERATING_COMPANY": "xx",
      "STORE_CLOSING_TIME": ["2019-01-03T22:00:00","2019-01-04T18:00:00"],
      "BATCH_ID": 1812,
      "STORENUMBER": 1198,
      "PROCESS_STATUS": "P"
  }]
  </code></pre>
  
  <p>I'm new to dataweave and tried using map but not able to understand how to achieve result.</p>