Name Tag requirement to get Lava Chicken music disc

Lava Chicken is more of an easter egg feature, and it can be quite jarring to encounter in regular gameplay unless you really happen to like the song itself or if you happen to like A Minecraft Movie where it originated. 

My suggestion for making it more optional and similar to other easter eggs (instead of just dropping from killing a Chicken Jockey) is to make it so you have to name the Chicken Jockey something specific using a Name Tag before it can drop the Music Disc. 

The name needed for it to work could simply be "Lava Chicken", but any reference to A Minecraft Movie makes sense.