[MC-116244] Minecraft Name capitalization changeable

The capitalization of a minecraft IGN can be changed by editing the "displayName" in the launcher_profiles.json. It is then still possible to join Multiplayerservers (online=true).

Example

"UUID": {
      "displayName": "coolMcName", //Can be "COOLMCNAME" too
      "accessToken": "ACCESS_TOKEN",
      "userid": "USERID",
      "uuid": "UUID",
      "username": "EMAIL"
    }