The NFL Draft, of course, is not about instant gratification. Each of the Green Bay Packers’ six draft picks will start OTAs later this month at or near the bottom of their positional depth charts. Even the draft pick with the clearest path to the starting lineup, sixth-round kicker Trey Smack, will be kicking second behind Lucas Havrisik when the team steps on the practice field for the first time after Memorial Day weekend. Here is why each of Green Bay’s draft picks could start in Week 1, and why they won’t. Round 2: No. 52: Brandon Cisse, CB, South Carolina Why he’ll start: Clearly, the Packers weren’t thrilled with the returning cornerback duo of Keisean Nixon and Carrington Valentine. That’s why general manager Brian Gutekunst released Nate Hobbs, signed Benjamin St-Juste and drafted Brandon Cisse and Domani Jackson. Cisse was one of top cornerback prospects in this year’s draft. He’s got excellent coverage ability and is a solid tackler.…