[bugfix] [shared/oval, RHEL/6, RHEL/7, Fedora]

Replace use of multiple (possibly outdated) versions of idtranslate.py
script by use of one common instance. This patch performs the following:

* Replace use of multiple versions of idtranslate.py script with use of
  one common version,
* Replace use of multiple versions of testcheck.py script with use of
  one common module (testcheck_module.py) & multiple testcheck.py
  callers (from necessary places of the repository),
* Add .gitignore content for Fedora/input/checks & shared/ directories.
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
Merge pull request #208 from iankko/second_version_fix_testcheck_py

[bugfix] [patch v#2] [shared/oval, RHEL/6, RHEL/7, Fedora] Replace use of multiple (possibly outdated) versions of idtranslate.py script by use of just one common instance
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
Merge remote-tracking branch 'upstream/master'