Fix messaging [WIP] (#1614)

* Fix messaging [WIP]

* Make codeclimate happy

* Codeclimate, pls

* got it, i hope

* Improvements

* Remove duplicated checks, other improvements, make login/logout broadcasts

* Optimize project imports

* Make codeclimate happy again

src/main/java/fr/xephi/authme/mail/OAuth2SaslClient.java

@@ -14,13 +14,13 @@
  */
 package fr.xephi.authme.mail;
 
-import java.io.IOException;
 import javax.security.auth.callback.Callback;
 import javax.security.auth.callback.CallbackHandler;
 import javax.security.auth.callback.NameCallback;
 import javax.security.auth.callback.UnsupportedCallbackException;
 import javax.security.sasl.SaslClient;
 import javax.security.sasl.SaslException;
+import java.io.IOException;
 
 /**
  * An OAuth2 implementation of SaslClient.
@@ -95,4 +95,4 @@ class OAuth2SaslClient implements SaslClient {
 
   public void dispose() throws SaslException {
   }
-}
+}

src/main/java/fr/xephi/authme/mail/OAuth2SaslClientFactory.java

@@ -15,12 +15,11 @@
  */
 package fr.xephi.authme.mail;
 
-import java.util.Map;
-import java.util.logging.Logger;
-
 import javax.security.auth.callback.CallbackHandler;
 import javax.security.sasl.SaslClient;
 import javax.security.sasl.SaslClientFactory;
+import java.util.Map;
+import java.util.logging.Logger;
 
 /**
  * A SaslClientFactory that returns instances of OAuth2SaslClient.