general: add NM_print_config test
Add test checking for priority of config files
and check they are visible with --print-config
.
Check the following:
- files are checked in order: /usr/lib/, /run/, /etc/ (latest wins)
- file with the same name overwrites previous dir
- the same section is overwritten (based on dir and filename lexicographicaly)
https://issues.redhat.com/browse/RHEL-14438
@RunTests:NM_print_config
Edited by Filip Pokryvka