responce to the review

Signed-off-by: Yuki Takagi <yuki.takagi@tier4.jp>

Author: yuki-takagi-66

autoware_launch/launch/planning_simulator.launch.xml

@@ -37,6 +37,8 @@
   <arg name="enable_all_modules_auto_mode" default="$(var scenario_simulation)" description="enable all module's auto mode"/>
   <!-- Simulated time -->
   <arg name="use_sim_time" default="$(var scenario_simulation)"/>
+  <!-- Localization-->
+  <arg name="localization_sim_mode" default="api" description="select localization mode. none, api"/>
 
   <group scoped="false">
     <!-- Vehicle -->
@@ -81,8 +83,7 @@
     <let name="launch_dummy_perception" value="true" unless="$(var scenario_simulation)"/>
     <let name="launch_dummy_vehicle" value="false" if="$(var scenario_simulation)"/>
     <let name="launch_dummy_vehicle" value="true" unless="$(var scenario_simulation)"/>
-    <!-- The following modes are available as localization_sim_mode: nothing, api -->
-    <let name="localization_sim_mode" value="api"/>
+    <let name="localization_sim_mode" value="$(var localization_sim_mode)"/>
     <let name="launch_diagnostic_converter" value="$(var scenario_simulation)"/>
 
     <include file="$(find-pkg-share autoware_launch)/launch/components/tier4_simulator_component.launch.xml">