TrkVertexKinematicFitterUtils add ATLAS_CHECK_THREAD_SAFETY
requested to merge ATLAS-EGamma/athena:TrkVertexKinematicFitterUtils_CHECK_THREAD_SAFETY into master
- Add ATLAS_CHECK_THREAD_SAFETY
- Add virtual/override/final
- Add
default - tidy up the code in places.
As a side note not 100% if one needs the polymorphic behaviour here , but there are some usage patterns so can not be removed so easily.