Implement AuthMeBungee autologin (#1402)

* Implement AuthMeBungee autologin

There is a failing test due to cyclic dependency injection, @ljacqu could you take a quick look at this?

* Try to fix recursive dependency injection

* Fix codestyle

* Fix the subchannel name, again...

* Split BungeeService into BungeeSender and BungeeReceiver

src/test/java/fr/xephi/authme/command/executable/authme/PurgeLastPositionCommandTest.java

@@ -3,8 +3,8 @@ package fr.xephi.authme.command.executable.authme;
 import fr.xephi.authme.data.auth.PlayerAuth;
 import fr.xephi.authme.datasource.DataSource;
 import fr.xephi.authme.message.MessageKey;
-import fr.xephi.authme.service.bungeecord.BungeeService;
 import fr.xephi.authme.service.CommonService;
+import fr.xephi.authme.service.bungeecord.BungeeSender;
 import org.bukkit.command.CommandSender;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -37,7 +37,7 @@ public class PurgeLastPositionCommandTest {
     private CommonService service;
 
     @Mock
-    private BungeeService bungeeService;
+    private BungeeSender bungeeSender;
 
     @Test
     public void shouldPurgeLastPosOfUser() {