Supress unchecked warnings for this test

Author: michaelklishin

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

@@ -400,6 +400,7 @@ public void process(GetResponse getResponse) {
  });
  }
 
+ @SuppressWarnings("unchecked")
  public void testRepublish() throws Exception {
  Map<String, Object> args = new HashMap<String, Object>();
  args.put("x-message-ttl", 100);