[Enhancement] Port single_user_auth to RHEL7 and Fedora

- Update RHEL7 and Fedora XCCDF for require_singleuser_auth
- Update require_singleuser_auth OVAL for RHEL7 and Fedora
Fix typos in OVAL
[RHEL/6, RHEL/7] Fix Limit Password Reuse remediation script
Merge pull request #286 from iankko/fix_limit_password_reuse_remediation_script

[RHEL/6, RHEL/7] Fix Limit Password Reuse remediation script
[bugfix] update manpage for RHEL7 to support RHEL7 content

- Update man page for RHEL7
- Add rht-cpp and common profiles to manpage
- Add draft USGBC
- Fixes #283
Update RHEL7 manpage to use shipping profiles
Update OCIL clause for single-user-auth

- Update OCIL clause for RHEL7 and Fedora
Merge pull request #261 from redhatrises/single_user_auth

[Enhancement] Port single_user_auth to RHEL7 and Fedora
Remove CPE variable from the example from the RHEL7 manpage
Merge pull request #287 from redhatrises/man_page_updates

[bugfix] update manpage for RHEL7 to support RHEL7 content
[RHEL7] Update RHEL6 to 7 ext4 to xfs

Simple system permissions update for RHEL6 to 7
Change Openswan to Libreswan
Merge pull request #290 from neo-aeon/Openswan_to_Libreswan

[RHEL7] Change Openswan to Libreswan
X11, switch inittab to default.target
Audit auid switch 500 to 1000
Merge pull request #291 from neo-aeon/inittab_to_set-default

[RHEL 7] X11, switch inittab to default.target
Merge pull request #292 from neo-aeon/audit_uid_1000

[RHEL 7] Audit auid switch 500 to 1000