[Issue #96] RHEL7 STIG: CCI-000200 The operating system must prohibit password reuse for a minimum of five generations

- Updated RHEL7 (and RHEL6) XCCDF to reflect new STIG requirement reducing password reuse from 24 to 5.
- Updated RHEL7 XCCDF to use idref variables
- Set default variable from 24 to 5

Resolves issue #96
[Issue #125] RHEL7 STIG: CCI-001619 The operating system must enforce password complexity by requiring that at least one special character be used

- Updated RHEL 6&7 guidance to use idref variable
- Added CCI/SRG to RHEL7

resolves issue #125
[Issue #95] RHEL7 STIG: CCI-000199 Operating systems must enforce a 60-day maximum password lifetime restriction

- Added CCE to RHEL7 XCCDF
- Added CCI to RHEL7 XCCDF
- Added SRG mapping to RHEL6/7
- Added rule into draft STIG profile
Adding *.swp to shared/.gitignore

For when you have the CCE listing open during commits =P
updating RHEL6 STIG profile to reflect updated DISA guidance on pw reuse
Updating RHEL7 STIG profile to reflect rules w/CCI assigned
[Issue #88] RHEL7 STIG: CCI-000192 The operating system must enforce password complexity by requiring that at least one uppercase character be used

- Added CCI/SRG
- Added rule to rhel7 stig profile

Resolves issue #88
[Issue #89] RHEL7 STIG: CCI-000193 The operating system must enforce password complexity by requiring that at least one lowercase character be used

- Updated CCI/SRG
- Added into rhel7 stig profile
[Issue 90] RHEL7 STIG: CCI-000194 Operating systems must enforce password complexity by requiring that at least one numeric character be used

- Added CCI/SRG
- Added into RHEL7 STIG profile
[Issue #97] RHEL7 STIG: CCI-000205 The operating system must enforce a minimum 15-character password length

- Added new XCCDF, OVAL, remediation for new rule to measure minlen of passwords
- Added into STIG profile
- Added CCE
[Issue #94] RHEL 7 STIG: CCI-000198 Operating systems must enforce 24 hours/1 day as the minimum password lifetime

resolves issue #94

- Maps password min age into STIG profile
- Added CCI/SRG references
[Issue #91] RHEL7 STIG: CCI-000195 The operating system must require the change of at least 15 of the total number of characters when passwords are changed

resolves issue #91

- Updated XCCDF to reflect DOD value of 15 char
- Added into STIG profile
- Added CCI/SRG
[Issue #72] RHEL7 STIG: CCI-000044 The operating system must enforce the limit of three consecutive invalid logon attempts by a user during a 15 minute time period

- Updated XCCDF to use subref variables
- Added rules into RHEL7 STIG profile
- Assigned CCE for fail_interval
[bugfix] closing XCCDF tags properly

testing in comments of PR 280
Merge pull request #280 from shawndwells/stig-passwords

Initial cut of RHEL7 STIG password requirements