Family coding error on ERFS_FPR in input_data_builder

[elie-gerschel]

Branch ipp_rebased

Assertion not true when running with ERFS_FPR 2013

openfisca-france-data/openfisca_france_data/erfs_fpr/input_data_builder/step_04_famille.py

Line 671 in 8063916

assert not famille.duplicated().any()