Slightly improve UTF-8 tests

Author: chibenwa

server/mailet/integration-testing/src/test/java/org/apache/james/mailets/AddDeliveredToHeaderTest.java

@@ -30,7 +30,6 @@
 import java.io.File;
 
 import org.apache.james.jmap.mailet.filter.JMAPFiltering;
-import org.apache.james.mailets.configuration.CommonProcessors;
 import org.apache.james.mailets.configuration.MailetConfiguration;
 import org.apache.james.mailets.configuration.ProcessorConfiguration;
 import org.apache.james.modules.protocols.ImapGuiceProbe;
@@ -40,16 +39,11 @@
 import org.apache.james.transport.mailets.LocalDelivery;
 import org.apache.james.transport.mailets.RecipientRewriteTable;
 import org.apache.james.transport.mailets.RemoteDelivery;
-import org.apache.james.transport.mailets.SetMimeHeader;
-import org.apache.james.transport.mailets.Sieve;
 import org.apache.james.transport.mailets.ToProcessor;
-import org.apache.james.transport.mailets.ToRepository;
 import org.apache.james.transport.mailets.VacationMailet;
 import org.apache.james.transport.matchers.All;
-import org.apache.james.transport.matchers.HasMailAttribute;
 import org.apache.james.transport.matchers.RecipientIsLocal;
 import org.apache.james.transport.matchers.SMTPAuthSuccessful;
-import org.apache.james.transport.matchers.SenderIsLocal;
 import org.apache.james.utils.DataProbeImpl;
 import org.apache.james.utils.SMTPMessageSender;
 import org.apache.james.utils.TestIMAPClient;
@@ -125,6 +119,7 @@ void receivedMessagesShouldContainDeliveredToHeadersI8N() throws Exception {
             .awaitMessage(awaitAtMostOneMinute);
 
         assertThat(testIMAPClient.readFirstMessage())
+            .contains(RECIPIENT2_UTF8)
             .contains("testé")
             .contains("contenté");
     }