Without demo data, for the odoo-master transifex project

closes odoo/odoo#41935

X-original-commit: dab7670b73506fb3a835695ee3bd735e0c5e5c2b
Related: odoo/enterprise#7287
Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

closes odoo/odoo#35754

Signed-off-by: Damien Bouvy (dbo) <dbo@odoo.com>

This method is also renamed "_autorise_lock_date_changes" and check
tax_lock_date.

Task ID: 2039160

closes odoo/odoo#34068

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

Multi is the default api for methods, it is not necessary to explicitly
decorate methods with it, adds clutter and most people use it because
they see that the rest of the code uses it.

Done with `find . -type f -name '*.py' | xargs sed -i '/@api.multi/d'`

Commit https://github.com/odoo/odoo/commit/2eb344f23b3a9daa8e7c7ddaead145a8b05b39bf changed the dependancies of l10n_fr_certification which is not acceptable on stable. Instead, the method to check is now moved in account module (to avoid duplicated) and it is called by l10n_fr_certification and account_lock module.

Was task: https://www.odoo.com/web#id=38178&view_type=form&model=project.task&action=333&active_id=967&menu_id=4720
Was PR #22094