address the problem described in ROOT-6315

Make the enum overriding optional.

https://sft.its.cern.ch/jira/browse/ROOT-6315

GaudiPython/doc/release.notes

 Package: GaudiPython
 Package manager : Marco Clemencic
 
+! 2014-05-24 - Marco Clemencic
+ - Address the problem described in ROOT-6315 by making the enum overriding
+   optional.
+
 ! 2014-05-21 - Marco Clemencic
  - Moved dictionary for InterfaceID from GaudiPython to GaudiKernel.
 

GaudiPython/python/GaudiPython/Pythonizations.py

@@ -95,8 +95,10 @@ gbl.IUpdateManagerSvc.update = lambda self,obj: gbl.IUpdateManagerSvc.PythonHelp
 gbl.IUpdateManagerSvc.invalidate = lambda self,obj: gbl.IUpdateManagerSvc.PythonHelper.invalidate(self,obj)
 
 #---Globals--------------------------------------------------------------------
-gbl.StatusCode.SUCCESS = 1
-gbl.StatusCode.FAILURE = 0
+if not hasattr(gbl.StatusCode, 'SUCCESS'):
+    # emulate enums
+    gbl.StatusCode.SUCCESS = 1
+    gbl.StatusCode.FAILURE = 0
 
 # - string key, equality
 if hasattr ( gbl.Gaudi.StringKey ,'__cpp_eq__' ) :