Update RHEL7 XCCDF

- Update privileged commands to use sudo
- Update RHEL7 XCCDF from RHEL6 in preparation for RHEL7 updates
Update to accounts_password_pam_unix_remember

- Update XCCDF to use accounts_password_pam_unix_remember from accounts_password_reuse_limit
Add more XCCDF updates

- Add missed XCCDF updates
- Fix typo
Update time changes OCIL clause

- Update the OCIL clause for auditing time changes
Merge pull request #211 from redhatrises/update-xccdf

Update RHEL7 XCCDF