Default VTL formula for max Date is using wrong functions

[romaintailhurat]

In Pogues, we can define a range for a Date type response domain. If the designer don't, some default values are used.

In this case, the DDI will be:

<r:Range>
     <r:MinimumValue included="true">1900-01-01</r:MinimumValue>
    <r:MaximumValue included="true">format-date(current-date(),'[Y0001]-[M01]-[D01]')</r:MaximumValue>
</r:Range>

Note that the VTL expression in the maximum value is using the functions format-date and current-date which are valid XPath functions but not valid VTL functions (there is a current_date in VTL but not a format_date).

Ideally, we should if possible replicate the existing mecanism (using the current date).

The target is probably to be able to give both dates and VTL formulas in the Pogues fields.

[romaintailhurat]

@AnneHuSKa to review the target objective for designers.

[romaintailhurat]

see also InseeFr/Bowie#40