tools/zep_dispatch: Run dispatch with custom topology

[RocioRojas]

Description

./topogen.sh file only generate random distributions of the nodes and if you want to add a custom topology file the program change this file to a random topology, changing the expected behavior.

Steps to reproduce the issue

Let's suppose that the file [filenew.topo] exist in the folder /tools/zep_dispatch with a custom topology.

Run the following command in console:

make run TOPOLOGY= filenew.topo

Expected results

Is expected that the file [filenew.topo] will remain unaltered after command execution.

Actual results

The file changes the custom topology to a random one.

Versions

RIOT version Release 2022.04