(Corrects source of data in paragraphs five and eight to Merrill Edge from Merrill Lynch) By Bobbi Rebell NEW YORK, Nov 4 (Reuters) - Millennials are starting to earn real money. The oldest of them are pushing 35 years old, an age that is considered by some to be - OMG - middle age. In previous generations, they would be fully independent grownups. But these days, the cord cutting seems to be limited to televisions. As millennials make big, life-changing purchases, such as bu