body composition and lung parenchyma phenotype computations have inconsistent inputs

[rharmo]

It would be good if both phenotype scripts used the same input type for thechest regions/types.

In body_composition_phenotypes.py
chest_regions : array, shape ( R ), optional
chest_types : array, shape ( T ), optional

In parenchyma_phenotypes.py
chest_regions : list of strings
chest_types : list of strings