[world] reduce by 4 (271 scans) the number of laser scans.

worlds/isae_room-07009/isae_prex_telemetre.world

@@ -2881,7 +2881,7 @@
           <ray>
             <scan>
               <horizontal>
-                <samples>1081</samples>
+                <samples>271</samples>
                 <resolution>1</resolution>
                 <min_angle>-2.3562</min_angle>
                 <max_angle>2.3562</max_angle>