BOSTON (Reuters) – A private equity financier was sentenced on Wednesday to 15 months in prison for participating in a vast U.S. college admissions fraud scheme by conspiring to pay bribes to secure spots for his children at top schools. The sentence imposed on John Wilson, the founder Hyannis Port Capital, was the longest that any of the dozens of parents, coaches and other defendants charged in the “Varsity Blues” college admissions scandal have received to date. U.S. District Judge Nathaniel Gorton in Boston issued the sentence a week after sentencing another parent, former Wynn Resorts exe…