ERP5Workflow: ConfigurationWorkflow class now inheritates from Workflow

remove duplicated code

product/ERP5Workflow/Document/ConfigurationWorkflow.py

@@ -29,7 +29,7 @@
 from AccessControl import ClassSecurityInfo
 
 from Products.ERP5Type import Permissions, PropertySheet
-from Products.ERP5Type.XMLObject import XMLObject
+from Products.ERP5Workflow.Document.Workflow import Workflow
 from Products.ERP5Type.Globals import PersistentMapping
 
 from tempfile import mktemp
@@ -41,7 +41,7 @@ from Acquisition import aq_base
 
 from DateTime import DateTime
 
-class ConfigurationWorkflow(XMLObject):
+class ConfigurationWorkflow(Workflow):
   """
   A Business Configuration Workflow.
   """
@@ -120,25 +120,6 @@ class ConfigurationWorkflow(XMLObject):
     result = document.workflow_history[workflow_key][-1].copy()
     return result
 
-  def getDateTime(self):
-    """
-    Return current date time.
-    """
-    return DateTime()
-
-  def getStateChangeInformation(self, document, state, transition=None):
-    """
-    Return an object used for variable tales expression.
-    """
-    if transition is None:
-      transition_url = None
-    else:
-      transition_url = transition.getRelativeUrl()
-    return self.asContext(document=document,
-                          transition=transition,
-                          transition_url=transition_url,
-                          state=state)
-
   def _getWorkflowStateOf(self, ob, id_only=0):
       tool = self.getPortalObject().portal_workflow
       id = self.getId()

product/ERP5Workflow/Document/Workflow.py

@@ -115,8 +115,7 @@ class Workflow(IdAsReferenceMixin("", "prefix"), XMLObject):
     """
     Generate a key used in the workflow history.
     """
-    history_key = self.getReference()
-    return history_key
+    return self.getReference()
 
   def _updateWorkflowHistory(self, document, status_dict):
     """