** Swiss chocolate maker Barry Callebaut BARN.S shares rise close to 5% after it appointed Hein Schumacher as CEO, succeeding Peter Feld
** Hein Schumacher, who steered Unilever ULVR.L until his ousting last year, will start working at the Swiss firm from Monday next week
** "Trust in the previous leadership had been eroded for about a year, so a CEO change was long overdue," Vontobel says, as it ups its rating to "buy" from "hold"
** Barry Callebaut tops Switzerland's midcaps index .SMIM
(Reporting by Tristan Veyet in Gdansk)
((Tristan.chabba@thomsonreuters.com))