warehouse manager group has insufficient access to stock.location.route

create a user account belonging to group warehouse manager

with this account it is not possible to edit the configuration of a warehouse:

2014-01-14 16:01:02,786 9687 ERROR test_trunk openerp.http: Exception during JSON request handling.
Traceback (most recent call last):
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/http.py", line 321, in dispatch
    response["result"] = self._call_function(**self.params)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/http.py", line 194, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/service/model.py", line 112, in wrapper
    return f(dbname, *args, **kwargs)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/http.py", line 189, in checked_call
    return self.func(*a, **kw)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/webclient/addons/web/controllers/main.py", line 1115, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/webclient/addons/web/controllers/main.py", line 1107, in _call_kw
    return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/addons/mrp/stock.py", line 239, in write
    return super(stock_warehouse, self).write(cr, uid, ids, vals, context=None)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/addons/stock/stock.py", line 2814, in write
    self.change_route(cr, uid, ids, warehouse, vals.get('reception_steps', False), vals.get('delivery_steps', False), context=context_with_inactive)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/addons/stock/stock.py", line 2585, in change_route
    route_obj.write(cr, uid, warehouse.delivery_route_id.id, {'name': self._format_routename(cr, uid, warehouse, route_name, context=context)}, context=context)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/osv/orm.py", line 4179, in write
    self.check_access_rights(cr, user, 'write')
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/osv/orm.py", line 3944, in check_access_rights
    return self.pool.get('ir.model.access').check(cr, uid, self._name, operation, raise_exception)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/tools/cache.py", line 18, in lookup
    r = self.lookup(self2, cr, *args)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/tools/cache.py", line 46, in lookup
    value = d[key] = self.method(self2, cr, *args)
  File "/home/afayolle/work/oerp/testbox-trunk/parts/server/openerp/addons/base/ir/ir_model.py", line 740, in check
    raise except_orm(_('Access Denied'), msg % msg_params)
except_orm: (u'Access Denied', u'Sorry, you are not allowed to modify this document. Please contact your system administrator if you think this is an error.\n\n(Document model: stock.location.route)')