erp5_pdm: Transformation have Predicate Property Sheet

* This is needed in order to use of "effective_date" and "expiration_date" used in Composition Mixin to get the Transformation for the right date.

bt5/erp5_pdm/PortalTypePropertySheetTemplateItem/property_sheet_list.xml

@@ -11,4 +11,8 @@
  <portal_type id="Supply Cell">
   <item>Reference</item>
  </portal_type>
+ <portal_type id="Transformation">
+  <item>DublinCore</item>
+  <item>Predicate</item>
+ </portal_type>
 </property_sheet_list>
\ No newline at end of file