Johns Hopkins is one of the nation’s most selective universities, accepting just 10% of all undergraduate applicants. But this 1.1-acre property in prime Montecito aced the entrance exam, breezing into the fold with high honors. University president Ronald J. Daniels and his wife, faculty member Joanne Rosen, were so enamored with the house that they paid $5.2 million — very nearly the full asking price — for the place last year.