FFI: Fix NetworkTests plan config
This commit fixes:
- Containerfile path
- kernel-modules-extra package installation: if the package is not
installed, then the latest version gets installed, not necessarily
of the same version as the kernel, and then
modprobe sch_netem
fails, failing the test. Added a script that installs the same version as the kernel
Also, handling some shellcheck warnings - removing unnecessary cat usage, unused variables, added doublequotes, and also disabled one rule for usage of variables in printf format string, as here the format string is in the variable
Successful TC run: https://artifacts.osci.redhat.com/testing-farm/f4f5018b-b1e6-48f8-a69e-aa5fe0469b9f/
Edited by Mark Kemel