#723 Create provider for TimeoutTask and MessageTask, remove LimboCache#getInstance

- Create class to handle the creation of "LimboPlayer tasks" (adds encapsulation, reduces duplication)
- Move group setting into its own class because (mutual dependency between LimboCache and PermissionsManager otherwise)

src/main/java/fr/xephi/authme/process/ProcessService.java

@@ -2,6 +2,7 @@ package fr.xephi.authme.process;
 
 import fr.xephi.authme.output.MessageKey;
 import fr.xephi.authme.output.Messages;
+import fr.xephi.authme.permission.AuthGroupHandler;
 import fr.xephi.authme.permission.AuthGroupType;
 import fr.xephi.authme.permission.PermissionNode;
 import fr.xephi.authme.permission.PermissionsManager;
@@ -30,6 +31,9 @@ public class ProcessService {
     @Inject
     private PermissionsManager permissionsManager;
 
+    @Inject
+    private AuthGroupHandler authGroupHandler;
+
     /**
      * Retrieve a property's value.
      *
@@ -104,7 +108,7 @@ public class ProcessService {
     }
 
     public boolean setGroup(Player player, AuthGroupType group) {
-        return permissionsManager.setGroup(player, group);
+        return authGroupHandler.setGroup(player, group);
     }
 
 }