simulation: Define getTestedProperty() on mixin rather than subclasses.

This makes more sense as all Tester inherits from EquivalenceTesterMixin,
even project-specific EquivalenceTester classes.

Followup of: "simulation: improve equivalence testers explanations messages".

product/ERP5/Document/CategoryMembershipEquivalenceTester.py

@@ -102,8 +102,3 @@ class CategoryMembershipEquivalenceTester(Predicate, EquivalenceTesterMixin):
              decision_value=self.getTestedPropertyText(
                                decision_movement, tested_property)))
     return None
-
-# Temporary compatibility code that will fix existing data.
-# This Code must be removed in 2 years (end of 2017)
-from Products.ERP5.Document.StringEquivalenceTester import getTestedProperty
-CategoryMembershipEquivalenceTester.getTestedProperty = getTestedProperty

product/ERP5/Document/DateTimeEquivalenceTester.py

@@ -107,8 +107,3 @@ class DateTimeEquivalenceTester(Predicate, EquivalenceTesterMixin):
       raise SimulationError(
         "%r: Either Absolute Tolerance, Absolute Tolerance (Min) or Absolute Tolerance"
         "(Max) *must* be defined on a DateTime Divergence Tester" % self)
-
-# Temporary compatibility code that will fix existing data.
-# This Code must be removed in 2 years (end of 2017)
-from Products.ERP5.Document.StringEquivalenceTester import getTestedProperty
-DateTimeEquivalenceTester.getTestedProperty = getTestedProperty

product/ERP5/Document/FloatEquivalenceTester.py

@@ -215,8 +215,3 @@ class FloatEquivalenceTester(Predicate, EquivalenceTesterMixin):
     # converted to Decimals everywhere, then the float() call should
     # go away
     return float(result)
-
-# Temporary compatibility code that will fix existing data.
-# This Code must be removed in 2 years (end of 2017)
-from Products.ERP5.Document.StringEquivalenceTester import getTestedProperty
-FloatEquivalenceTester.getTestedProperty = getTestedProperty

product/ERP5/Document/StringEquivalenceTester.py

@@ -84,20 +84,3 @@ class StringEquivalenceTester(Predicate, EquivalenceTesterMixin):
              decision_value=decision_value,
              prevision_value=prevision_value))
     return None
-
-# Temporary compatibility code that will fix existing data.
-# This Code must be removed in 2 years (end of 2017)
-def getTestedProperty(self):
-  """
-  Override getTestedProperty to fix the way it is stored. Some time
-  ago it was multi-valued, which is non-sense we the implementation we
-  have on this equivalence tester.
-  """
-  tested_property = getattr(self, 'tested_property', None)
-  if tested_property != None:
-    if isinstance(tested_property, tuple):
-      if len(tested_property) == 1:
-        setattr(self, 'tested_property', tested_property[0])
-  return self._baseGetTestedProperty()
-
-StringEquivalenceTester.getTestedProperty = getTestedProperty

product/ERP5/mixin/equivalence_tester.py

@@ -215,3 +215,18 @@ class EquivalenceTesterMixin:
     tested_property = self.getTestedProperty()
     return {tested_property: self._getTestedPropertyValue(prevision_movement,
                                                           tested_property)}
+
+  # Temporary compatibility code that will fix existing data.
+  # This Code must be removed in 2 years (end of 2017)
+  def getTestedProperty(self):
+    """
+    Override getTestedProperty to fix the way it is stored. Some time
+    ago it was multi-valued, which is non-sense we the implementation we
+    have on this equivalence tester.
+    """
+    tested_property = getattr(self, 'tested_property', None)
+    if tested_property != None:
+      if isinstance(tested_property, tuple):
+        if len(tested_property) == 1:
+          setattr(self, 'tested_property', tested_property[0])
+    return self._baseGetTestedProperty()