Use offlineplayer permission resolution as we no longer need the work…

…around.

src/main/java/com/sk89q/craftbook/bukkit/CraftBookPlugin.java

@@ -1000,7 +1000,7 @@ public boolean hasPermission(CommandSender sender, String perm) {
         // Invoke the permissions resolver
         if (sender instanceof Player) {
             Player player = (Player) sender;
-            return PermissionsResolverManager.getInstance().hasPermission(player.getWorld().getName(), player.getName(), perm);
+            return PermissionsResolverManager.getInstance().hasPermission(player.getWorld().getName(), player, perm);
         }
 
         return false;