Prevent unwanted syslog message interpolation

Stop treating raw log input as a syslog format string, and instead
pass the input as a format arg to the '%s' format string. This will
prevent syslog from trying to interpolate random log messages as
format strings.

Resolve bug https://bugzilla.redhat.com/show_bug.cgi?id=1095914
Merge pull request #5402 from ironcladlou/stg/syslog-interpolation-fix

Merged by openshift-bot