Merge branch 'TrkFitterUtils_Check_thread' into 'master'

Tracking/TrkFitter/TrkFitterUtils/CMakeLists.txt

...r/TrkFitterUtils/TrkFitterUtils/ATLAS_CHECK_THREAD_SAFETY

...itter/TrkFitterUtils/TrkFitterUtils/DNA_MaterialEffects.h

...rkFitterUtils/TrkFitterUtils/KalmanMatEffectsController.h

...tter/TrkFitterUtils/TrkFitterUtils/ProtoMaterialEffects.h

.../TrkFitterUtils/TrkFitterUtils/ProtoTrackStateOnSurface.h

...er/TrkFitterUtils/TrkFitterUtils/ProtoTrajectoryUtility.h

...kFitter/TrkFitterUtils/TrkFitterUtils/SensorBoundsCheck.h

...ing/TrkFitter/TrkFitterUtils/src/ProtoMaterialEffects.cxx

...TrkFitter/TrkFitterUtils/src/ProtoTrackStateOnSurface.cxx

Tracking/TrkFitter/TrkFitterUtils/src/SensorBoundsCheck.cxx