py2/py3: use six.get_unbound_function.

bt5/erp5_core_test/TestTemplateItem/portal_components/test.erp5.testWorkflowHistoryList.py

@@ -35,8 +35,9 @@ from Products.ERP5Type.patches.WorkflowTool import \
   WorkflowHistoryList as LegacyWorkflowHistoryList
 from Products.ERP5Type.tests.ERP5TypeTestCase import ERP5TypeTestCase
 from six.moves import range
+from six import get_unbound_function
 
-orig_maybe_rotate = DoublyLinkList._maybe_rotate.__func__
+orig_maybe_rotate = get_unbound_function(DoublyLinkList._maybe_rotate)
 
 def _maybe_rotate(self):
   if len(self._log) < 16:

bt5/erp5_dummy_movement/DocumentTemplateItem/portal_components/document.erp5.DummyMovement.py

@@ -31,7 +31,7 @@
 from AccessControl import ClassSecurityInfo
 from Products.ERP5Type import Permissions, PropertySheet, interfaces
 from erp5.component.document.Movement import Movement
-
+from six import get_unbound_function
 
 class DummyMovement(Movement):
   """Dummy Movement for testing purposes."""
@@ -72,7 +72,7 @@ class DummyMovement(Movement):
     parent = self.getParentValue()
     if isinstance(parent, DummyDelivery):
       self = parent
-    return DummyDelivery.getSimulationState(self)
+    return get_unbound_function(DummyDelivery.getSimulationState)(self)
 
   def getDeliveryValue(self):
     """