Revert "use SteadyTimer for cleaning up inactive streams (#45)" (#51)

This reverts commit ae74f19.

Author: jihoonl

include/web_video_server/web_video_server.h

@@ -51,7 +51,7 @@ class WebVideoServer
   void cleanup_inactive_streams();
 
   ros::NodeHandle nh_;
-  ros::SteadyTimer cleanup_timer_;
+  ros::Timer cleanup_timer_;
   int ros_threads_;
   int port_;
   std::string address_;

src/web_video_server.cpp

@@ -42,7 +42,7 @@ WebVideoServer::WebVideoServer(ros::NodeHandle &nh, ros::NodeHandle &private_nh)
     nh_(nh), handler_group_(
         async_web_server_cpp::HttpReply::stock_reply(async_web_server_cpp::HttpReply::not_found))
 {
-  cleanup_timer_ = nh.createSteadyTimer(ros::WallDuration(0.5), boost::bind(&WebVideoServer::cleanup_inactive_streams, this));
+  cleanup_timer_ = nh.createTimer(ros::Duration(0.5), boost::bind(&WebVideoServer::cleanup_inactive_streams, this));
 
   private_nh.param("port", port_, 8080);
   private_nh.param("verbose", __verbose, true);