Task #2942: We need to set 'outputs' field 'ok' when we're exiting early...

Task #2942: We need to set 'outputs' field 'ok' when we're exiting early because our output file already exists.

CEP/Pipeline/recipes/sip/nodes/dppp.py

@@ -80,6 +80,7 @@ class dppp(LOFARnodeTCP):
                 self.logger.info(
                     "Output file %s already exists. We're done." % outfile
                 )
+                self.outputs['ok'] = True
                 return 0
 
             # Create a working copy if input and output are identical, to