Remove static injections in ListenerService

- Get other classes via Inject annotation
- Remove no longer needed Utils methods (relates to #736)
- Create tests for ListenerService and AuthMeBlockListener
- Performance improvement: keep unrestricted names as Set instead of List for faster contains() method

src/main/java/fr/xephi/authme/api/API.java

@@ -179,7 +179,7 @@ public class API {
      */
     @Deprecated
     public boolean isNPC(Player player) {
-        return Utils.isNPC(player);
+        return instance.getPluginHooks().isNpc(player);
     }
 
 }