catalog tool: move compilation of python script inside changeObjectClass

Python script needs to be recompiled when they comes from a change of
class. This was done when business template was installing scripts, but
not when automatic migration from old catalog to new catalog was done.
So make sure to call _compile directly in changeObjectClass to make sure
Python Scripts would always work after a change of class.

product/ERP5/Document/BusinessTemplate.py

@@ -3026,7 +3026,6 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
           method = changeObjectClass(catalog, method_id, sql_class)
         if method.meta_type == 'Script (Python)':
           method = changeObjectClass(catalog, method_id, script_class)
-          method._compile()
         new_obj  = method.aq_base
         self._objects[path] = new_obj
 

product/ERP5/Extensions/CheckPortalTypes.py

@@ -45,6 +45,11 @@ def changeObjectClass(self, object_id, new_class):
         i['meta_type'] = getattr(new_obj, 'meta_type', None)
         break
   new_obj = self._getOb(object_id, new_obj)
+  # Python scripts needs to be recompiled. If we need similar action on other types,
+  # we might later add a function "_afterClassChange" to perform different actions
+  # depending on the class
+  if hasattr(new_obj, '_compile'):
+    new_obj._compile()
   if new_obj.isIndexable:
     new_obj.reindexObject()
   elif new_obj.portal_type == 'Catalog':