TruthClassificationTool: add ability to use truth particles and their MCTC information
Add ability to use truth particles and their MCTC information to TruthClassificationTool.
This should not affect the existing behaviour but would allow to run the tool also on truth particles. Note that the output may not be as reliable, but should allow basic truth studies to be done.
It also allows to optionally use recomputed classifierTruthType and classifierTruthOrigin, not to change the current behaviour.