[FIX] account_bank_statement_import: default partner

When importing a bank statement containing an unknown bank account
number, the newly created account is automatically linked to the partner
of the current company.

This is due to the default value for `partner_id`.

Introduced in 6db235385a

opw-1816832

addons/account_bank_statement_import/account_bank_statement_import.py

@@ -195,7 +195,10 @@ class AccountBankStatementImport(models.TransientModel):
                             bank_account_id = partner_bank.id
                             partner_id = partner_bank.partner_id.id
                         else:
-                            bank_account_id = self.env['res.partner.bank'].create({'acc_number': line_vals['account_number']}).id
+                            bank_account_id = self.env['res.partner.bank'].create({
+                                'acc_number': line_vals['account_number'],
+                                'partner_id': False,
+                            }).id
                     line_vals['partner_id'] = partner_id
                     line_vals['bank_account_id'] = bank_account_id