CI build failed on ubuntu 20.4

[sameh-farouk]

Description

in ubuntu 20.4 build failed because of 2 failed tests
FAILED tests/sals/process/test_process.py::ProcessTests::test_20_get_ports_mapping
FAILED tests/sals/process/test_process.py::ProcessTests::test_21_get_defunct_processes

More

related to #535

[AhmedHanafy725]

For defunct processes, I think we need a wait for the process to start
For ports mapping, seems netstat is not installed by default on ubuntu 20.04, so we maybe can install it on the workflow apt install -y net-tools

[sameh-farouk]

For defunct processes, I think we need a wait for the process to start
For ports mapping, seems netstat is not installed by default on ubuntu 20.04, so we maybe can install it on the workflow apt install -y net-tools

confirmed. installing it in the workflow fixes the issue.
fixed in #536