title: Set value in field in redux form
body: <p>I have redux form having dropdown and text fields. On dropdown change i have to update the other fields. The other fields are using custom component example
      </p>
  
  <p>So the structure is like.
  1. component having form
  2. Field component.</p>
  
  <p>Now i googled and found few things to update the field but not able to do it.
  What i tried
  1. Adding state in the field like below in value. Does not work.</p>
  
  <pre><code>&lt;Field name="accountno" value="this.state.accountno" component={InputText} placeholder="Number" /&gt;
  </code></pre>
  
  <ol start="2">
  <li><p>Tried disptach but not able to use it. Getting error for no dispatch i prop type</p>
  
  <p>this.props.dispatch(change('form', 'accountno', 'test value'));</p></li>
  <li><p>Tried this.props.fields but same not fields in props type.</p></li>
  </ol>
  
  <p>It should work using 2 or 3 but not able to find where to add those. Please let me know how can i use these or any other way.</p>