Increase default dashboard client timeout to 2 seconds (#1564)

The default timeout of 1 second can collide with certain actions. For
example, the power_off command on PolyScope 5 takes 1 sec almost exactly
until it sends the answer. With that, the timeout was right on the edge
and led to a flaky integration test. Defaulting to 2 seconds should
prevent those tests from failing randomly.

Author: urfeex

ur_robot_driver/src/dashboard_client_ros.cpp

@@ -51,7 +51,7 @@ namespace ur_robot_driver
 DashboardClientROS::DashboardClientROS(const rclcpp::Node::SharedPtr& node, const std::string& robot_ip)
   : node_(node), primary_client_(robot_ip, notifier_)
 {
-  node_->declare_parameter<double>("receive_timeout", 1);
+  node_->declare_parameter<double>("receive_timeout", 2);
 
   primary_client_.start(10, std::chrono::seconds(10));
   auto robot_version = primary_client_.getRobotVersion();