Generate valid domain for search_rec_name

When searching on another field, it is the first element of the clause that
must be removed instead of use it only.

issue7099
review41021002

stock.py

@@ -92,7 +92,7 @@ class Package:
     def search_rec_name(cls, name, clause):
         domain = super(Package, cls).search_rec_name(name, clause)
         return ['OR', domain,
-            ('shipping_reference',) + tuple(clause[:1]),
+            ('shipping_reference',) + tuple(clause[1:]),
             ]
 
 
@@ -132,7 +132,7 @@ class ShipmentOut:
     def search_rec_name(cls, name, clause):
         domain = super(ShipmentOut, cls).search_rec_name(name, clause)
         return ['OR', domain,
-            ('reference',) + tuple(clause[:1]),
+            ('reference',) + tuple(clause[1:]),
             ]
 
     @classmethod