#1037 Improve architecture of registration methods (#236)

* #1037 Improve architecture of registration methods
- Introduce parameters classes for each registration method
- RegistrationMethod has constants with the required parameters class -> no longer need to have a RegistrationExecutorProvider class that needs to be injected everywhere, let AsyncRegister be the only one to worry about which class will perform the registration
- Fix inheritance of password registration types - previously two-factor auth registration inherited from password registration directly

* Create matcher which checks for equality via reflections
- Allow to perform equality check on objects with default equals() method

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

@@ -8,7 +8,8 @@ import fr.xephi.authme.process.login.AsynchronousLogin;
 import fr.xephi.authme.process.logout.AsynchronousLogout;
 import fr.xephi.authme.process.quit.AsynchronousQuit;
 import fr.xephi.authme.process.register.AsyncRegister;
-import fr.xephi.authme.process.register.executors.RegistrationExecutor;
+import fr.xephi.authme.process.register.executors.RegistrationMethod;
+import fr.xephi.authme.process.register.executors.RegistrationParameters;
 import fr.xephi.authme.process.unregister.AsynchronousUnregister;
 import fr.xephi.authme.service.BukkitService;
 import org.bukkit.command.CommandSender;
@@ -60,8 +61,8 @@ public class Management {
         runTask(() -> asynchronousLogout.logout(player));
     }
 
-    public void performRegister(Player player, RegistrationExecutor registrationExecutor) {
-        runTask(() -> asyncRegister.register(player, registrationExecutor));
+    public <P extends RegistrationParameters> void performRegister(RegistrationMethod<P> variant, P parameters) {
+        runTask(() -> asyncRegister.register(variant, parameters));
     }
 
     public void performUnregister(Player player, String password) {