Workaround for bug 24086.

Author: Simon MacMullen

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

@@ -145,6 +145,12 @@ private void expectUnexpectedFrameError(Confuser confuser)
         //NB: the frame confuser relies on the encoding of the
         //method field to be at least 8 bytes long
         channel.basicPublish("", "routing key", null, "Hello".getBytes());
+        // TODO remove when bug 24086 is fixed.
+        try {
+            Thread.sleep(100);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
         expectError(AMQP.UNEXPECTED_FRAME);
     }