ConfigurationState.py: add getDestinationReferenceList which returns a list of destination id list.

product/ERP5Workflow/Document/ConfigurationState.py

@@ -120,3 +120,6 @@ class ConfigurationState(XMLObject):
     """
     status_dict = self.getParentValue().getCurrentStatusDict(document)
     return status_dict[variable_name]
+
+  def getDestinationReferenceList(self):
+    return self.getDestinationIdList()