[FIX] account_facturx: do not write non-existing fields

If a field does not exist, writing it creates a warning in the logs.
This would for example prevent a valid test to pass.
This is needed because extract_state is a field from account_invoice_extract,
which is not a dependency of account_facturx.

addons/account_facturx/models/account_move.py

@@ -329,4 +329,5 @@ class AccountMove(models.Model):
             raise UserError(_('No decoder was found for the xml file: {}. The file is badly formatted, not supported or the decoder is not installed').format(attachment.name))
 
     def _remove_ocr_option(self):
-        self.write({'extract_state': 'done'})
+        if 'extract_state' in self:
+            self.write({'extract_state': 'done'})