Big banks are joining forces with the firms that were supposed to be disrupting them (JPM, BARC, C)

REUTERS/Jo Yong hak America's biggest banks are backing online lenders.  Wall Street institutions like Citigroup, JPMorgan and Barclays are partnering with startups that, in many cases, set out to disrupt the banks they are now colloborating with.  Student loan refinancing specialist CommonBond on Tuesday announced the closing of a $275 million warehouse line of funding from Macquarie Capital, Barclays and other investors. "You'll start to see more and more banks partner" with startups, Com...