erp5configurator: ConfiguratorItemMixin should not inherit Base class. Because...

erp5configurator: ConfiguratorItemMixin should not inherit Base class. Because of this wrong inheritance, configurator item classes did not work as Folder.

product/ERP5Configurator/mixin/configurator_item.py

@@ -33,7 +33,7 @@ from Products.ERP5Type.Base import Base
 from zLOG import LOG, INFO
 import time
 
-class ConfiguratorItemMixin(Base):
+class ConfiguratorItemMixin:
   """ This is the base class for all configurator item. """
 
   def getBusinessConfigurationValue(self):