Namespacing lidar topic

[retinfai]

Desired behavior

The lidar sensor publishes to the /lidar topic. This becomes a problem when i want multiple robots operating in the same simulation.

Alternatives considered

You can sort the messages by their header.

Implementation suggestion

It's more beautiful to namespace the topics. I imagine we just alter the line that sets the topic to include the id/name of the robot. The question is whether these things are accessible inside the sensor.

[retinfai]

We can namespace on the xacro side. Closing this issue