Last June, Brian Grubbs, of Colorado, suffered a Salmonella Saintpaul infection after consuming contaminated jalapeno peppers.  His illness was one of more than 1,200 in a nationwide outbreak.    The Grubbs purchased the peppers at their local WalMart.   Marler Clark subsequently filed suit against WalMart on Mr. Grubbs behalf.   WalMart tried unsuccessfully to have the suit thrown out, and has