title: Using import with a level specification isn't supported by AccessControl: _warnings
body: <p>I'm having problem with FS controller page template. I had this Plone2 base product which i have eggified while doing Plone 4.2 migration. I have pasted traceback below.</p>
  
  <pre><code>Traceback (innermost last):
    Module ZPublisher.Publish, line 126, in publish
    Module ZPublisher.mapply, line 77, in mapply
    Module ZPublisher.Publish, line 46, in call_object
    Module Products.CMFFormController.FSControllerPageTemplate, line 91, in __call__
    Module Products.CMFFormController.BaseControllerPageTemplate, line 26, in _call
    Module Products.CMFFormController.FormController, line 384, in validate
    Module ZPublisher.mapply, line 77, in mapply
    Module ZPublisher.Publish, line 46, in call_object
    Module Products.CMFFormController.FSControllerValidator, line 58, in __call__
    Module Products.CMFFormController.Script, line 145, in __call__
    Module Products.CMFCore.FSPythonScript, line 130, in __call__
    Module Shared.DC.Scripts.Bindings, line 322, in __call__
    Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec
    Module Products.PythonScripts.PythonScript, line 344, in _exec
    Module script, line 32, in exams_list
     - &lt;FSControllerValidator at /dev/exam/online/booking/validators/exams_list&gt;
     - Line 32
    Module AccessControl.ZopeGuards, line 299, in guarded_import
  Unauthorized: Using import with a level specification isn't supported by AccessControl: _warnings
  </code></pre>
  
  <p>line 32 on exams_list validators is wrap with astric</p>
  
  <pre class="lang-python prettyprint-override"><code>if event and not state.getErrors():
    try:
       context.script.validateEvent()
    except ValueError,exc: 
       state.setError('SIMSError',str(exc))
    **except 'dryrun':**
       state.setStatus('dryrun')
  </code></pre>
  
  <p>Any help or pointer always helpful.</p>