Several changes to topics and namespaces
Created by: ksatyaki
This pulls in changes that work on the citi-trucks with iliad_metapackage launch files. Latest version from the MS2 demo.
It is possible to change all topic names to parameters and thus get rid of any hard coding in any of the .cpp files. This pull request can be deferred until that is fixed.
orunav_vehicle_execution_node.cpp seems to be one such file (with sort of hard coded topic names instead of topic names being read from parameters).