A new tax of 10% has been introduced in October 2019 in Japan.
Add this tax and relative tax group, fiscal position, etc.

Conserve the 8% tax as some sale could use it as a reduced tax rate.

closes odoo/odoo#42538

closes odoo/odoo#42629

X-original-commit: 18925d7fcadac7f30f29d46f7c45e87b083e9e5e
Original-signed-off-by: Josse Colpaert <jco@openerp.com>
Signed-off-by: Josse Colpaert <jco@openerp.com>