The default product category and uom should be fixed on generic
undeletable records (in data files).
And by caching those default values, we can gain up to 20% time when
creating products without providing uom and categories.
Also remove the unnecessary defaults on the compute fields, which do the
same as the compute (and have no use because it is a non stored field).
closesodoo/odoo#45791
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>
Victor Feyens
d3bbe14c8d