Set publisher and subscriber repository as public repositories

[Paullgk]

Currently latency tests are using code (publisher and subscriber source code) coming from private repositories.
The workaround to use them is to build from these source docker images and put them in belonging directory src/trafgen and src/svtools.
The problem is that latency tests can not be executed by person who does not have access to these sources.

The solution would be to set svtools (subscriber source code) and trafgen (publisher source code) repositories as public.