[IMP] sale_mrp: use the new signal_xxx methods instead of trg_validate.

bzr revid: tta@openerp.com-20130201060837-6uiv82cobhwjhimg

addons/sale_mrp/test/sale_mrp.yml

@@ -103,11 +103,8 @@
   !python {model: procurement.order}: |
     sale_order_obj = self.pool.get('sale.order')
     so = sale_order_obj.browse(cr, uid, ref("sale_order_so0"))
-    import netsvc
-    wf_service = netsvc.LocalService("workflow")
     proc_ids = self.search(cr, uid, [('origin','=',so.name)])
-    for proc in proc_ids:
-      wf_service.trg_validate(uid, 'procurement.order',proc,'button_check', cr)
+    self.signal_button_check(cr, uid, proc_ids)
 -
   I verify that a procurement state is "running"
 -