Update SetSUMBT Code

convlab/dst/setsumbt/__init__.py

convlab/dst/setsumbt/calibration_plots.py

convlab/dst/setsumbt/configs/end2_setsumbt_multiwoz21.json

...ab/dst/setsumbt/configs/ensemble_setsumbt_multiwoz21.json

convlab/dst/setsumbt/configs/setsumbt_multiwoz21.json

convlab/dst/setsumbt/dataset/__init__.py

convlab/dst/setsumbt/dataset/ontology.py

convlab/dst/setsumbt/datasets/__init__.py

convlab/dst/setsumbt/datasets/distillation.py

convlab/dst/setsumbt/datasets/metrics.py

convlab/dst/setsumbt/datasets/unified_format.py

convlab/dst/setsumbt/datasets/utils.py

convlab/dst/setsumbt/datasets/value_maps.py

convlab/dst/setsumbt/distillation_setup.py

convlab/dst/setsumbt/do/evaluate.py

convlab/dst/setsumbt/do/nbt.py

convlab/dst/setsumbt/get_golden_labels.py

convlab/dst/setsumbt/loss/__init__.py

convlab/dst/setsumbt/loss/uncertainty_measures.py

convlab/dst/setsumbt/modeling/__init__.py