grid_cells example: reduce rate

Author: rhaschke

src/test/send_grid_cells_node.cpp

@@ -38,7 +38,7 @@ int main(int argc, char** argv)
   ros::NodeHandle nh;
 
   ros::Publisher pub = nh.advertise<nav_msgs::GridCells>("grid_cells", 100);
-  ros::Rate loop_rate(100);
+  ros::Rate loop_rate(30);
 
   nav_msgs::GridCells msg;
   int width = 500;