title: PBS Professional hook not updating Priority
body: <p>I am trying to implement a hook to determine a job's priority upon entering the queue.</p>
  
  <p>The hook is enabled, imported, and event type is "queuejob", so it is in place (like other hooks we have enabled).  This hook however does not seem to alter a job's priority as I am expecting.</p>
  
  <p>Here is a simplified example of how I'm trying to alter the Priority for a job:</p>
  
  <pre><code>import pbs
  
  try:
  
     e=pbs.event()
     j=e.job
  
     if j.server == 'myserver':
  
        j.Priority = j.Priority + 50
        e.accept()
  
  except SystemExit:
     pass
  </code></pre>
  
  <p>Whenever I submit a job after importing this hook, I run the 'qstat -f' on my job, the Priority is always 0, whether I set it to another value in my qsub script or leave it to the default. </p>
  
  <p>Thank you.</p>