Also generate _baseSet* accessors for acquired properties

Prior to this change, such accessors were only generated if
'acquisition_base_category' was set on the accessor, but such accessor also
makes sense without acquisition_base_category.

product/ERP5Type/Core/AcquiredProperty.py

@@ -478,7 +478,8 @@ class AcquiredProperty(StandardProperty):
   }
 
   _content_type_acquired_property_id_setter_definition_dict = {
-    '_set%s': ContentProperty.Setter
+    '_set%s': ContentProperty.Setter,
+    '_baseSet%s': ContentProperty.Setter
   }
 
   _content_type_acquired_property_id_tester_definition_dict = {