Fixed ref file of GaudiPythonTutorial for using new counters

Sebastien Poncerequested to merge
sponce_dropOldCounters into master

Goes together with LHCb!2725 (merged), Lbcom!501 (merged), Rec!2181 (merged), Brunel!1063 (merged), Boole!298 (merged), Alignment!140 (merged)

This is part of the migration to new counters.

Edited by Sebastien Ponce

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