CNBC's Jim Cramer on Tuesday discussed Starbucks' management shakeup, saying the new leadership will be crucial to turn the business around. The ubiquitous coffee chain on Tuesday announced it would replace current CEO Laxman Narasimhan with Brian Niccol, who is currently the CEO of Chipotle."Brian Niccol is the key to a new Starbucks, one that can reclaim its old mantle as the 'third place' — you just need to know that this turnaround can't happen overnight, he said. "But, I'm telling you, it's going to ha ...