change of syslog severity

[thl-cmk]

At the moment syslog messages are send like this

• Files (potentially) vulnerable > Severity alert
• Files mitigated > Severity notice
• "error": "Skipping broken jar file..." > Severity debug

I would like to have this changed a bit,

• Files mitigated > change the configuration option --syslog-level info to --syslog-level notice to match the severity
• "error": "Skipping broken jar file..." > Severity error, because this is an error, the option --syslog-level debug should then be changed from debug to error.

The Severity debug could be used in conjunction with the --trace option if need be.
Messages like "Running scan (10s): scanned 9119 directories, ..." could use the severity info.