The 2015 release “RandyPOP!” is a live recording that is both a summation of a half-century-and-counting professional career and a birthday present to the artist who was an integral component to the selections within. Arrangements of songs by James Brown, Bruce Springsteen, Paul Simon, Donald Fagen, Todd Rundgren, and others, delivered by a first-rate ensemble, exemplify the jazz-rock fusion that developed in the fertile musical ground of the late 1960s and ’70s.