Fix: Fix the false fail checks in Azure Linux 3 v1.0.0

[LaibaBareera]

Summary
This PR fixes test expectations and handling for several CIS checks to improve accuracy and reduce false failures.

Changes

• Check 2.2.18: Replace hyphen with underscore in the expected test string.
• Check 4.1.1: When “package iptables is not installed” is detected, set the check value to false instead of true.
• Checks 5.1.2 – 5.1.7: Treat checks as pass if the referenced file does not exist.

Rationale

• Aligns test expectations with actual output formatting.
• Prevents incorrect passing when iptables is missing.
• Ensures file-based controls don’t fail when the target file is legitimately absent.

Results:
Check 2.2.18

Check 4.1.1

Check 5.1.2-5.1.7

[afdesk]

IIUC /etc/cron.daily is a folder. maybe I miss something
so do we need to use -d flag here?

[LaibaBareera]

No it is file, I have checked it

[afdesk]

maybe is it make sense to convert permission checks to the numeric stat -Lc style used in 5.1.5–5.1.7 for consistency?