bt5_lang: Try to save properties explicitly for an object in a bt5

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/ObjectPropertyTemplateItem/object_property_list.xml

+<object_property_list>
+  <object relative_url="portal_catalog/erp5_mysql_innodb">
+    <property name="sql_search_result_keys">
+      <item>catalog.path</item>
+      <item>catalog.uid</item>
+    </property>
+  </object>
+</object_property_list>
\ No newline at end of file

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/bt/template_object_property_list

+portal_catalog/erp5_mysql_innodb | sql_search_result_keys_list
\ No newline at end of file