fix unit test

Author: Benoît Lévêque

pkg/sqs/Tests/Functional/SqsCommonUseCasesTest.php

@@ -102,7 +102,13 @@ public function testProduceAndReceiveOneMessageSentDirectlyToQueue()
 
         $this->assertEquals(__METHOD__, $message->getBody());
         $this->assertEquals(['FooProperty' => 'FooVal'], $message->getProperties());
-        $this->assertEquals(['BarHeader' => 'BarVal'], $message->getHeaders());
+        $this->assertEquals(
+            [
+                'BarHeader' => 'BarVal',
+                'message_id' => '50fad30a-173b-4653-b001-4b18bfe75d2e',
+            ],
+            $message->getHeaders()
+        );
     }
 
     public function testProduceAndReceiveOneMessageSentDirectlyToTopic()