Syntax Error generates when the user gives invalid python code in 'account_tax'
module and uses that tax while creating invoice.

Steps to produce:
 * Install 'account_tax_python' module
 * Go to configuration/taxes and create a new tax.
 * Select Tax Computation as 'python code' and give some special characters to
   python code field and save it.
 * Now create an invoice, add a  product and add the above created tax in taxes.
 * At this moment traceback raises.

By applying these changes will resolve this issue.

closes odoo/odoo#122290

Sentry: 4060222060
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>

The license is missing in most enterprise manifest so
the decision was taken to make it explicit in all cases.
When not defined, a warning will be triggered starting from
14.0 when falling back on the default LGPL-3.

closes odoo/odoo#74231

Related: odoo/enterprise#19850
Related: odoo/design-themes#43
Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>