issue(non-blocking): aide_periodic_cron_checking default var not defined

[jacollins121]

Description of problem:

Default value for var in STIG role removed in latest 0.1.79 release.

SCAP Security Guide Version:

V2

Operating System Version:

RHEL 9

Steps to Reproduce:

1. Attempt to execute the role without specifically defining aide_periodic_cron_checking in play vars.

Actual Results:

aide_periodic_cron_checking not defined error when running role.

Expected Results:

aide_periodic_cron_checking: true set in defaults/main.yml

Additional Information/Debugging Steps: