completely shutdown inital_pose_sub_ (#4176)

Signed-off-by: GoesM <GoesM@buaa.edu.cn>
Co-authored-by: GoesM <GoesM@buaa.edu.cn>

nav2_amcl/src/amcl_node.cpp

@@ -326,6 +326,7 @@ AmclNode::on_cleanup(const rclcpp_lifecycle::State & /*state*/)
   // don't continue to process incoming messages
   global_loc_srv_.reset();
   nomotion_update_srv_.reset();
+  executor_thread_.reset();  //  to make sure initial_pose_sub_ completely exit
   initial_pose_sub_.reset();
   laser_scan_connection_.disconnect();
   tf_listener_.reset();  //  listener may access lase_scan_filter_, so it should be reset earlier