Changing handling of the errors according to discussion following

Changing handling of the errors according to discussion following
ALICE Offline Weekly Meeting (6 Aug 2009) and ALICE Trigger Meeting
(7 Aug 2009) - see:

http://indico.cern.ch/conferenceDisplay.py?confId=65472

and

http://indico.cern.ch/conferenceDisplay.py?confId=65383

Included in the commit, the macro to test the GRPPreprocessor,
simulating different types of errors, and an example macro on how to create
dummy entries for CTP Config and Scalers.