unsynchronized data due to start_date format
I noticed some unsynchronized records in Administration / Model / Model / Data from account_fr module, account.tax.template model, that can't be synchronized (error out with "You are not allowed to modify this record. This record is part of the base configuration.")
the `start_date` field is the difference.
for example with `tva_vente_biens_20` id:
- value: [..., ["start_date",{"__class__":"date","year":2014,"month":1,"day":1}], ...]
- value on fs: [..., ["start_date","2014-01-01"], ...]
on IRC, cedk@ told me that "in the XML they are encoded as string but they should be evaluated as date instances"