Update spawn_sign launch sample x,y,yaw values

launch/spawn_sign.launch

@@ -3,9 +3,9 @@
   <arg name="name"  default="stop1"/>
   <arg name="tag"   default="alvar0"/>
   <arg name="type"  default="stop"/>
-  <arg name="x"     default="0.0"/>
-  <arg name="y"     default="0.0"/>
-  <arg name="yaw"   default="0.0"/>
+  <arg name="x"     default="0.5"/>
+  <arg name="y"     default="-0.5"/>
+  <arg name="yaw"   default="3.14159"/>
   <arg name="model" default="sign"/>
   <arg name="model_path"  default="$(find sign_description)/urdf/$(arg model).xacro"/>
   <arg name="parent"      default="map"/>
@@ -40,4 +40,4 @@
         if="$(arg rviz)"
         args="-d $(find sign_description)/rviz/$(arg name).rviz"/>
 
-</launch>
+</launch>
\ No newline at end of file