use getExpandablePropertyDict instead of getUpdatablePropertyDict

getUpdatablePropertyDict was already used to know which properties
asComposedDocument need to generate. So we need another method name
to copy properties for the composed document to simulation movement

product/ERP5/MovementCollectionDiff.py

@@ -120,7 +120,11 @@ def _getPropertyDict(document, updating_tester_list=None):
   assert updating_tester_list is not None
   property_dict = {}
   for tester in updating_tester_list:
-    property_dict.update(tester.getUpdatablePropertyDict(document, None))
+    property_dict.update(tester.getExpandablePropertyDict(document))
+  # causality and trade phase are controled by business process, not rules,
+  # so they are not availables as part of updating tester list
+  for property_id in ("causality", "trade_phase"):
+    property_dict.update(**{property_id: document.getPropertyList(property_id)})
   return property_dict
 
 def _getPropertyList(document, acquire=True):

product/ERP5/interfaces/equivalence_tester.py

@@ -124,6 +124,14 @@ class IEquivalenceTester(Interface):
     decision_movement -- a delivery movement (decision)
     """
 
+  def getExpandablePropertyDict(input_movement):
+    """
+    Returns a list of properties coming from input movement to
+    update on simulation movement
+
+    input_movement -- a prevision movement
+    """
+
   def update(prevision_movement, decision_movement):
     """
     Updates decision_movement with properties from

product/ERP5/mixin/equivalence_tester.py

@@ -212,3 +212,10 @@ class EquivalenceTesterMixin:
     tested_property = self.getTestedProperty()
     return {tested_property: self._getTestedPropertyValue(prevision_movement,
                                                           tested_property)}
+
+  def getExpandablePropertyDict(self, input_movement):
+    """
+    By default, the result of getUpdatableMovement is doing exactly what
+    we need
+    """
+    return self.getUpdatablePropertyDict(input_movement, None)
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