[MERGE] orm: make sure all *Model classes define _auto,_register,_transient

This is required to avoid strange mro() pitfalls
where an AbstractModel is inherited by a Model,
and the _auto=False of AbstractModel ends up
first in the mro() because Model does not explicitly
define it, and the BaseModel default _auto is farther
in the mro().

lp bug: https://launchpad.net/bugs/1013566 fixed

bzr revid: odo@openerp.com-20120621110825-ry8e5tktvwv3h4tm

openerp/osv/orm.py

@@ -5004,6 +5004,7 @@ class Model(BaseModel):
     The system will later instantiate the class once per database (on
     which the class' module is installed).
     """
+    _auto = True
     _register = False # not visible in ORM registry, meant to be python-inherited only
     _transient = False # True in a TransientModel
 
@@ -5016,6 +5017,7 @@ class TransientModel(BaseModel):
        records they created. The super-user has unrestricted access
        to all TransientModel records.
     """
+    _auto = True
     _register = False # not visible in ORM registry, meant to be python-inherited only
     _transient = True
 
@@ -5031,6 +5033,7 @@ class AbstractModel(BaseModel):
        """
     _auto = False # don't create any database backend for AbstractModels
     _register = False # not visible in ORM registry, meant to be python-inherited only
+    _transient = False
 
 
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