bt5_config: Update build function for BusinessItem object to consider case of path containing property

This will help in neglecting the properties and then save them in ObjectPropertyTempaltePackageItem.
This saves us from exporting properties twice, once with object and other with object path.

For ex:
BP5 erp5_mysql_innodb_catalog can be saved as
erp5_mysql_innodb.xml (but without all properties)
object_property_list.xml (keeping track of specific properties for erp5_mysql_innodb)