Add a protection against Geant info in stderr

DaVinciTests/python/DaVinciTests/QMTest/DaVinciExclusions.py

 ###############################################################################
-# (c) Copyright 2000-2021 CERN for the benefit of the LHCb Collaboration      #
+# (c) Copyright 2000-2023 CERN for the benefit of the LHCb Collaboration      #
 #                                                                             #
 # This software is distributed under the terms of the GNU General Public      #
 # Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   #
@@ -72,5 +72,9 @@ remove_known_fluctuating_counters = LineSkipper(regexps=[
     r' \| "Size of compressed data" .*'
 ])
 
-preprocessor = RecPreprocessor + remove_uninteresting_lines + remove_known_warnings
+# appears in stderr
+remove_known_errors = LineSkipper(strings=[
+    'Info in <TGeoManager>: Changing system of units to Geant4 units (mm, ns, MeV).'
+])
+preprocessor = RecPreprocessor + remove_uninteresting_lines + remove_known_warnings + remove_known_errors
 counter_preprocessor = remove_known_fluctuating_counters