gazebo: give 'remap' launch arg a more descriptive name

[gavanderhoorn]

The *_gazebo.launch files currently expose a remap argument that, when true, remap the default topics from the gazebo_ros plugin (and friends) to the ROS-Industrial driver spec compliant ones.

remap is too generic a name, and should be changed into something which more clearly conveys its purpose / effect.

[gavanderhoorn]

Launch files in rx160_gazebo and the to-be-introduced tx90_gazebo packages (see #6) are affected.

[nilsmelchert]

Good idea. Besides renaming "remap" to something more meaningful, I think using the ROS-Industrial driver spec compliant topics by default would be a good idea. Since this is a ROS-Industrial repo, it makes a lot of sense to work with the industrial convention in gazebo by default.

[nilsmelchert]

What about extending the argument "remap" to something more meaningful like "ros_remapping", "ros_remap", "ros_i_remapping" or "ros_i_remap" and set the default value to true.

[nilsmelchert]

So if I did a PR for this, would you consider merging it? Or is there a reason not to do these changes?