Keep graph manager alive until destruction

micro_ros_agent/include/agent/graph_manager/graph_manager.hpp

@@ -80,9 +80,7 @@ public:
     /**
      * @brief   Default destructor.
      */
-    ~GraphManager() = default;
-
-	void stop()
+    ~GraphManager()
     {
         if (microros_graph_publisher_.joinable())
         {

micro_ros_agent/src/agent/Agent.cpp

@@ -188,13 +188,6 @@ void Agent::run()
 void Agent::stop()
 {
     xrce_dds_agent_instance_.stop();
-
-    for (auto & element : graph_manager_map_)
-    {
-        element.second.stop();
-    }
-
-    graph_manager_map_.clear();
 }
 
 graph_manager::GraphManager* Agent::find_or_create_graph_manager(eprosima::fastdds::dds::DomainId_t domain_id)