Set owner of audit log files

Add task to get list of all audit log files.
Add root ownership requirenemnt to existing task.
Add finding ID to task that enables iptabes
Set default ip6tables policy to DROP

Remove 'test' tags
Add 'ipv6' tags
Add task to set /etc/shadow mode to 0000
Add finding ID to task that sets grub.conf perms
Find accounts with UID 0

Correct tag for finding V-38585
Add tasks to list accounts with UID 0 other than root and display accounts
Add finding ID to system-auth-ac template task
Set ower, group, perms on /etc/shadow