Fix the bug in DataInfoBase table

[mohammadbashiri]

The following lines throws an error:

nnfabrik/nnfabrik/templates/trained_model.py

Lines 329 to 330 in 744ae10

	dataset_fn, dataset_config = (self.dataset_table & key).fn_config
	data_info = dataset_fn(**dataset_config, return_data_info=True)

Because fn_config returns a string as dataset_fn:

nnfabrik/nnfabrik/main.py

Lines 233 to 236 in 744ae10

	def fn_config(self):
	dataset_fn, dataset_config = self.fetch1("dataset_fn", "dataset_config")
	dataset_config = cleanup_numpy_scalar(dataset_config)
	return dataset_fn, dataset_config

[chbehrens]

Would it be possible to fix this some time soon? Adding just one line like
dataset_fn = self.dataset_table.resolve_fn(dataset_fn)
below l. 239 in trained_model.py should be enough as far as I can see. I can also make a pull request out of it if you prefer it that way.