Sean Ono Lennon’s first experience re-working his father’s catalog was terrifying and intimidating, but he had two main goals in mind to keep him on track: Preserve his father’s message in the songs and help the late icon’s music reach a younger audience.On Friday, which would have been John Lennon’s 80th birthday, “GIMME SOME TRUTH. THE ULTIMATE MIXES” will be released and includes 36 tracks