Fix system tests

Author: LukasBrand

src/systemTest/java/com/hivemq/cli/commands/cli/publish/PublishST.java

@@ -146,11 +146,11 @@ void test_multipleTopics(final char mqttVersion) throws Exception {
         publishCommand.add("test3");
 
         final ExecutionResult executionResult = MqttCli.execute(publishCommand);
-        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message') MqttPublish{topic=test1"));
+        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message')"));
         assertTrue(executionResult.getStandardOutput().contains("MqttPublish{topic=test1"));
-        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message') MqttPublish{topic=test2"));
+        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message')"));
         assertTrue(executionResult.getStandardOutput().contains("MqttPublish{topic=test2"));
-        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message') MqttPublish{topic=test3"));
+        assertTrue(executionResult.getStandardOutput().contains("sending PUBLISH ('message')"));
         assertTrue(executionResult.getStandardOutput().contains("MqttPublish{topic=test3"));
 
         final Set<String> topicSet =