Nestle investors are hoping the Swiss food group can draw a line under a period of volatility and sliding shares after the company accelerated the departure of its chairman, hot on the heels of a scandal that toppled its CEO. After the early exit of chairman Paul Bulcke, 71, former Inditex CEO Pablo Isla will take the reins on Oct 1, half a year ahead of schedule, challenged to revive the fortunes of the maker of KitKat chocolate and Nescafe coffee maker by revving up ales and focusing on fewer brands. Isla, 61, is the first outsider to be named chairman at Nestle in 25 years, and could help new CEO Philipp Navratil, 49, as he looks to placate investors...