roscpp ActionClient subscription queue size should be consistent with…

… rospy. (#162)

* roscpp ActionClient subscription queue size should be more than 1, and also consistent with rospy.
* expand test duration for test_exercise_simple_clients.
* Revert "expand test duration for test_exercise_simple_clients."
* expand test duration and timeout for test_exercise_simple_clients.
* Revert " expand test duration and timeout for test_exercise_simple_clients."

actionlib/include/actionlib/client/action_client.h

@@ -221,9 +221,9 @@ class ActionClient
     int pub_queue_size;
     int sub_queue_size;
     n_.param("actionlib_client_pub_queue_size", pub_queue_size, 10);
-    n_.param("actionlib_client_sub_queue_size", sub_queue_size, 1);
+    n_.param("actionlib_client_sub_queue_size", sub_queue_size, -1);
     if (pub_queue_size < 0) {pub_queue_size = 10;}
-    if (sub_queue_size < 0) {sub_queue_size = 1;}
+    if (sub_queue_size < 0) {sub_queue_size = 0;}
 
     status_sub_ = queue_subscribe("status", static_cast<uint32_t>(sub_queue_size),
         &ActionClientT::statusCb, this, queue);