Slight cleanup and better support for server reloads

bukkit/src/main/java/me/lucko/luckperms/LPBukkitPlugin.java

@@ -14,7 +14,6 @@ import net.milkbowl.vault.permission.Permission;
 import org.bukkit.Bukkit;
 import org.bukkit.command.PluginCommand;
 import org.bukkit.plugin.PluginManager;
-import org.bukkit.plugin.RegisteredServiceProvider;
 import org.bukkit.plugin.ServicePriority;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -55,6 +54,9 @@ public class LPBukkitPlugin extends JavaPlugin implements LuckPermsPlugin {
         userManager = new BukkitUserManager(this);
         groupManager = new GroupManager(this);
 
+        // Run update task to refresh any online users
+        new UpdateTask(this).run();
+
         int mins = getConfiguration().getSyncTime();
         if (mins > 0) {
             long ticks = mins * 60 * 20;
@@ -76,6 +78,11 @@ public class LPBukkitPlugin extends JavaPlugin implements LuckPermsPlugin {
 
     }
 
+    @Override
+    public void onDisable() {
+        datastore.shutdown();
+    }
+
     @Override
     public void doAsync(Runnable r) {
         Bukkit.getScheduler().runTaskAsynchronously(this, r);