Deleting the argument "-gP" => Infered from  grobid-home parameter (-gH)
Quality code update.
Adding the generation of one-jar to be able to execute org.grobid.trainer.TrainerRunner as  a batch.
Build the needed pathes from grobid-home.
Formatting.
Add of the parameter -gH to get the path to grobid-home.
Formatting.