Apple has appointed veteran PR strategist Brian Bumbery as the new Director of Apple Music Publicity, Variety reports. Bumbery, who has worked with major music acts such as Metallica, Green Day, Chris Cornell and Madonna, comes to Apple from his own BB Gun Press firm, which he started 2011. The new appointment comes as Beats co-founder Jimmy Iovine is transitioning into a consulting role this month, stepping back from the daily operations of the music…