Bank of America’s recent major play to expand its credit card business has also landed the company a highly touted mortgage outsourcing operation. But how Nexstar Financial Services will fare as part of BofA remains unclear. Nexstar was launched in 1999 as a business-to-business provider of state-of-the-art loan processing capability. Since it was started from scratch, the company had all the newest technology, and its focus was on streamlining the origination process as much as…