Fixed CraftOfflinePlayer.getLastPlayed() returning the wrong result. Addresses BUKKIT-847

By: Olof Larsson <olof@sylt.nu>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java

@@ -167,7 +167,7 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
 
     public long getLastPlayed() {
         Player player = getPlayer();
-        if (player != null) return player.getFirstPlayed();
+        if (player != null) return player.getLastPlayed();
 
         NBTTagCompound data = getBukkitData();