InDetRecExample: python 3 fixes

...etExample/InDetRecExample/share/ConfiguredBackTracking.py

.../InDetRecExample/share/ConfiguredInDetPreProcessingTRT.py

...tExample/InDetRecExample/share/ConfiguredInDetTRTPhase.py

...xample/InDetRecExample/share/ConfiguredInDetTrackTruth.py

...xample/InDetRecExample/share/ConfiguredInDetValidation.py

...tExample/InDetRecExample/share/ConfiguredLowBetaFinder.py

...e/InDetRecExample/share/ConfiguredNewTrackingSiPattern.py

...nDetRecExample/share/ConfiguredNewTrackingTRTExtension.py

.../InDetRecExample/share/ConfiguredPriVtxAndPartCreation.py

...mple/InDetRecExample/share/ConfiguredTRTSegmentFinding.py

...tExample/InDetRecExample/share/ConfiguredTRTStandalone.py

...Example/InDetRecExample/share/InDetMonitoringAlignment.py

...DetExample/InDetRecExample/share/InDetMonitoringGlobal.py

.../InDetExample/InDetRecExample/share/InDetMonitoringSCT.py

.../InDetExample/InDetRecExample/share/InDetMonitoringTRT.py

...e/InDetRecExample/share/InDetRecCaloSeededROISelection.py

...r/InDetExample/InDetRecExample/share/InDetRecLoadTools.py

...etExample/InDetRecExample/share/InDetRecPostProcessing.py

...ple/InDetRecExample/share/InDetRecPreProcessingSilicon.py

...InDetExample/InDetRecExample/share/InDetRec_jobOptions.py