completely shutdown inital_pose_sub_ (ros-navigation#4176)

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

nav2_amcl/src/amcl_node.cpp

@@ -333,6 +333,7 @@ AmclNode::on_cleanup(const rclcpp_lifecycle::State & /*state*/)
  global_loc_srv_.reset();
  initial_guess_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