[REVERT] point_of_sale: change back to a write() to change company currency
[REVERT] point_of_sale: change back to a write() to change company currency

This test being run during install, thih does not provoque any problems
as no CoA are already installed.

This partially revert commit b11621476bcee658e912cbfbd9569b7d29ca6b53

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo