[RHEL/6] audit_rules_sysadmin_actions rule:
* Unify XCCDF ID with OVAL id (in XCCDF & in profile references),
* Fix OVAL check:
  - to treat 'aw' / 'wa' access type equally,
  - enhance it to make 'wa' / 'aw' minimum requirement (not the exact one) =>
    present permission mask like 'rxwa' would pass too,
* Add RHEL-6 remediation.