Musician, writer, producer, actor, activist-- Steve Van Zandt has expressed himself artistically in many ways over the last 50 years and now has his own documentary, “Stevie Van Zandt: Disciple,” on HBO and Max this week. The film includes interviews with Bruce Springsteen, Paul McCartney and Bono, hailing Van Zandt as a musician and an activist who led a successful campaign against apartheid. (June 27)