Remove too stringent assert when importing survey dataframe
Remove too stringent assert when importing survey dataframe

antoinearnoud/openfisca-france,SophieIPP/openfisca-france,adrienpacifico/openfisca-france,benjello/openfisca-france,sgmap/openfisca-france,sgmap/openfisca-france,antoinearnoud/openfisca-france,benjello/openfisca-france,adrienpacifico/openfisca-france,SophieIPP/openfisca-france