Event String names should be consistently cased

Created by: dsparacio

Some history Michael and My intention was CoreEvents.js are all internal client events that a player will not need access to, if we want something to be documented and external it can be moved from CoreEvnets to MediaPlayerEvents with no other changes. This is because all events are pushed into Events.js which the client uses internally. In addition events marked with prefix string "public_" E.g. ProtectionEvents.js, this will be programmatically moved to MediaPlayerEvents as well so you can access them in one place at the player level.

We need to pick one style and apply. camelCased VS lowercased