title: Extract JSON fields without looping in Talend
body: <p>On a json like the following</p>
  
  <pre><code>{ 
    'a' : 'hello'
    'b' : { 'c' : 'hello', 'd': 'hello2' }
  }
  </code></pre>
  
  <p>I am unable to extract c and d because the component loops on b, if I specify json loop path to be <code>"$.*"</code> and field to be extracted <code>'b'</code>. </p>
  
  <p>What is the right way to configure the tExtractJsonFields for simple json extraction?</p>