By Tom Sims and Frank Siebelt FRANKFURT (Reuters) – Deutsche Bank begins a new epoch on Thursday as Chairman Paul Achleitner leaves after a rocky decade during which Germany’s largest lender lost billions and saw its share price plummet. If all goes to plan at Deutsche’s annual general meeting on Thursday, Alexander Wynaendts, a Dutch former insurance executive, will be voted in to succeed Achleitner. Wynaendts, who is set for a four-year term as chairman, is a former head of Dutch insurer Aegon, which also had staff around the world and a large U.S. presence during a turbulent decade, experie…