Path object is actually a string

[thibaultdvx]

Ass mentioned in #662, there is an issue with the expression any(["_run-" not in f.name for f in files]) line 668 of clinicadl/utils/clinica_utils.py:

clinicadl/clinicadl/utils/clinica_utils.py

Line 668 in 41824d6

if len(files) < 2 or any(["_run-" not in f.name for f in files]):

It seems that files does not contain only Path objects, which raises the following error: AttributeError: 'str' object has no attribute 'name'.