(Reuters) - Supervalu Inc on Monday named a new president for its Save-A-Lot discount chain and announced other management changes as the supermarket operator and food distributor gets ready to close a deal that will make it a leaner company. Supervalu said it should close the deal to sell five of its supermarket chains to an investor group led by Cerberus Capital Management LP during the week of March 18. It had announced the $3.3 billion transaction, which includes the assumption of $3.2 billion in debt, in January. Supervalu is retaining its food wholesaler serving 1,950 U.S. ...