Add optional syslog support to Rails apps

Add ability to send the broker log, usage log, user action log, and
console log to syslog (optional, disabled by default).
Add syslog support

Use 1-line "if" statements
Add/correct syslog-logger in Gemfiles

Add/correct syslog-logger in Gemfiles.
Set version to ~> 1.6.8.
Set :require to false.
Fix typo
Merge pull request #4649 from ncdc/dev/rails-syslog

Merged by openshift-bot