FileListValGen: don't save and load extensive file lists (val attribute)
FileListValGen: don't save and load extensive file lists (val attribute)

TWOEARS/identification-training-pipeline,TWOEARS/identification-training-pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/identification-training-pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/identification-training-pipeline,TWOEARS/identification-training-pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/Auditory-Machine-Learning-Training-and-Testing-Pipeline,TWOEARS/identification-training-pipeline