explicitly 2 threaded multi ros2 simple

.gitmodules

@@ -20,3 +20,6 @@
 [submodule "src/cyclonedds"]
 	path = src/cyclonedds
 	url = git@git.niklashalle.net:niklas/cyclonedds.git
+[submodule "src/tracetools_analysis"]
+	path = src/tracetools_analysis
+	url = git@git.niklashalle.net:niklas/tracetools_analysis.git

src/full_topology/src/simple.cpp

@@ -98,7 +98,7 @@ int main(int argc, char **argv)
   #ifdef MULTI_THREADED
     // Create a multi-threaded executor to handle all nodes
     std::cout << "multi threaded ros default" << std::endl;
-    rclcpp::executors::MultiThreadedExecutor executor;
+    rclcpp::executors::MultiThreadedExecutor executor{{}, 2};
   #else
     // Create a single-threaded executor to handle all nodes
     std::cout << "single threaded ros default" << std::endl;

src/tracetools_analysis

@@ -0,0 +1 @@
+Subproject commit e18ddb62d580e6f56dc4e232370a2c93beaedb7c