title: how to set default value for ChoiceParameterDefinition parameter
body: <p>I am using jenkins Pipeline and trying to use parameters ( Inputs ) Like .e.g. </p>
  
  <pre><code>[$class: 'ChoiceParameterDefinition', choices: ['ADD','SHOW','DELETE','UPDATE','RESET'], description: 'Choose an Operation', name: ''].
  </code></pre>
  
  <p>How to set default value for ChoiceParameterDefinition ?</p>