Change test_sysctl_probe_all to succeed for non-root users
Change test_sysctl_probe_all to succeed for non-root users

- add blacklist for confidential kernel params
- set PATH explicitly to make sure sysctl is found

fix for #1263

redhatrises/openscap,redhatrises/openscap,redhatrises/openscap,redhatrises/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,redhatrises/openscap,OpenSCAP/openscap,OpenSCAP/openscap,redhatrises/openscap,OpenSCAP/openscap