By Jessica DiNapoli and Svea Herbst-Bayliss NEW YORK (Reuters) -Some investors in PepsiCo (PEP) support suggestions by activist shareholder Elliott Investment Management that the global food and beverage company cut costs and ditch sleepy brands like Quaker, but sound more cautious about the hedge fund's boldest idea - to hive off the soda maker's bottling network. Elliott has said the move, which mirrors actions taken by Coca-Cola (KO) nearly a decade ago, would increase PepsiCo's margins, allow the $20 ...