Before this commit, some tests were indirectly using demo data.
For example `env['res.partner'].search([])` would return demo data in
addition to the partners created for the tests.
This commit changes that by ensuring that the records used are limited
to the records made for the tests. Some values have been adjusted to
account for the lower amount of available records.
closesodoo/odoo#72553
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>