[FIX] models.py: Don't commit after fetching a translation

Purpose
=======

When trying the translate a sql_contraint message after an integrity error
we use the current cursor in a 'with', just to make a SELECT query.

That way, the cursor is commited at the end of the with statement, trying
to commit the inconsitent state of the cursor that was the reason of the
integrity error.

Just close the cursor, as we only fetch translations from the database.

closes odoo/odoo#36458

Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

odoo/service/model.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+from contextlib import closing
 from functools import wraps
 import logging
 from psycopg2 import IntegrityError, OperationalError, errorcodes
@@ -73,7 +74,7 @@ def check(f):
 
             # We open a *new* cursor here, one reason is that failed SQL
             # queries (as in IntegrityError) will invalidate the current one.
-            with odoo.sql_db.db_connect(dbname).cursor() as cr:
+            with closing(odoo.sql_db.db_connect(dbname).cursor()) as cr:
                 if ttype == 'sql_constraint':
                     res = translate_sql_constraint(cr, key=key, lang=lang)
                 else: