The Office of Federal Housing Enterprise Oversight has a new ally in the fight to recapture separation payments given to former Freddie Mac executives: Freddie Mac. The GSE signed a pair of agreements with OFHEO last week that ensured Freddie will help the agency recover documents needed for their administrative case against Leland Brendsel, former Freddie CEO, and Vaughn Clarke, former Freddie CFO. The two executives received full severance payouts when they left the company…