The former president of Bristol Community College scored a $131,000 payout when he retired last year, state payroll data show, adding to a lengthy list of ex-college heads whose parting paychecks have riled Beacon Hill watchdogs.John “Jack” Sbrega’s previously unreported payout was among the highest — and featured in $77.7 million in total buyouts — awarded last year, which included fellow ex-president Daniel Asquino of Mount Wachusett Community College and his $265,000 golden parachute in sick time.