Check if the parser is general

[danieleongari]

        output_cif = xyz2cif(
            os.path.join(out_folder._repository._get_base_folder().abspath,
                         'DDEC6_even_tempered_net_atomic_charges.xyz'))

https://github.com/yakutovicha/aiida-ddec/blob/develop/aiida_ddec/parsers/__init__.py#L134

The plugin is currently parsing a file with name DDEC6_even_tempered_net_atomic_charges.xyz, but since you can use the chargemol program to compute also DDEC3 charges, I think it can probably print outputs with different names.

This is not a big problem since we are not using the deprecated DDEC3, but it may suggest that for different options different filenames are printed, causing problems in the parser.