title: Camel file input reads same file continuously even with given noop=true
body: <p>The camel file component is reading the same file continuously and not detecting other files. </p>
  
  <p>I have a camel route as,</p>
  
  <pre><code>&lt;camelContext trace="false" xmlns="http://camel.apache.org/schema/spring"&gt;
      &lt;route&gt;
          &lt;from uri="file:C:/Books/input_dir?noop=true"/&gt;
          &lt;dynamicRouter&gt;
              &lt;method ref="fileRouter" method="routeFiles"&gt;&lt;/method&gt;
          &lt;/dynamicRouter&gt;
      &lt;/route&gt;
  &lt;/camelContext&gt;
  &lt;bean id="fileRouter" class="org.test.demo.DynamicRouter"/&gt;
  </code></pre>
  
  <p>and Router as,</p>
  
  <pre><code>public class DynamicRouter {
      public String routeFiles(Exchange exchange){
          final String fileName = (String) exchange.getIn().getHeader(Exchange.FILE_NAME_ONLY);
          System.out.println("FILENAME: "+fileName);
          if(fileName.contains("survival")){
              return "file:C:/Books/output_dir";
          }else {
              return "file:C:/Books/target_dir";
          }
      }
  } 
  </code></pre>
  
  <p>Whenever a file say <strong>beahomelist</strong>  is dropped into <code>C:/Books/input_dir</code> folder it reads the first file and never stops as the log below</p>
  
  <blockquote>
    <p>FILENAME: beahomelist FILENAME: beahomelist FILENAME: beahomelist
    FILENAME: beahomelist FILENAME: beahomelist FILENAME: beahomelist
    FILENAME: beahomelist FILENAME: beahomelist....</p>
  </blockquote>
  
  <p>and doest not detect any further files put in the same folder. Even though noop=true is given it happens so. Please provide some suggestions on this. I am using camel version: 2.13.0</p>