ROS planner may display error and warning messages

[sumjos]

When demoC or demoD is launched, following messages can be displayed:

[ WARN] [1523736594.947345603, 9.383000000]: Map update loop missed its desired rate of 2.0000Hz... the loop actually took 1.5250 seconds
[ERROR] [1523736595.193476441, 9.475000000]: [setParam] Failed to contact master at [localhost:11311]. Retrying...

Description

1. Warning means map update took longer than the set update frequency in config files. The reason for this is a large global and local cost map sizes, which is set in: /MAVs/ros/src/system/config/planner/ros_base_planner/global_costmap_params.yaml, and
   /MAVs/ros/src/system/config/planner/ros_base_planner/local_costmap_params.yaml
   These warnings might not occur in a fast system.

2. Error occurs while setting large vectors in ROS parameter server, generated by ROS planner(vector contains path coordinates) in file,
   MAVs/ros/src/computing/planning/motion/mavs_ros_planner/src/NavsPathConverter.cpp
   Agan, this might not occur in fast systems. It has been noticed that a smaller vector size didn't cause this issue.