[FIX] Trigger stored field recalculation for inherited records

The create() method implicitly creates record on objects of the _inherits.
Therefore, in order to make the trigger on linked field works, we should
include all the _inherits values (field that makes the link to the rel
record) because they are created implicitly.
[FIX] Model.create: trigger stored field recalculation for implicit parent_id fields during create  

The create() method implicitly creates parent records on objects of the _inherits.
Therefore, in order to make the trigger on the linked field works, we should
include all the _inherits values (fields that make the link to the parent
record) because they are created implicitly.
The write() method does not need this change, as any update of the parent
fields has to be explicit.