Delete test queue

It would sit in the broker after the test suite because it is not
exclusive and was not deleted.

(cherry picked from commit 3210e09)

Author: acogoluegnes

src/test/java/com/rabbitmq/client/test/functional/Confirm.java

@@ -66,6 +66,12 @@ public void setUp() throws IOException, TimeoutException {
                           "confirm-multiple-queues");
     }
 
+    @Override
+    protected void releaseResources() throws IOException {
+        super.releaseResources();
+        channel.queueDelete("confirm-durable-nonexclusive");
+    }
+
     @Test public void persistentMandatoryCombinations()
         throws IOException, InterruptedException, TimeoutException {
         boolean b[] = { false, true };