[FIX] registry: avoid dropping indexes

When an index has name 'tablename_fieldname_index', this index is
dropped if the field has index=False.  This lead to dropping a
user-created index or dropping/recreating the index when index=True is
set in a dependent module.  Some info is logged instead.

closes odoo/odoo#67602

X-original-commit: 6a87318df296a11e3300723ca0c8b49c0dcf5fa7
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>

odoo/modules/registry.py

@@ -452,7 +452,7 @@ class Registry(Mapping):
                 except psycopg2.OperationalError:
                     _schema.error("Unable to add index for %s", self)
             elif not index and indexname in existing:
-                sql.drop_index(cr, indexname, tablename)
+                _schema.info("Keep unexpected index %s on table %s", indexname, tablename)
 
     def add_foreign_key(self, table1, column1, table2, column2, ondelete,
                         model, module, force=True):