SOSFTPHistoryJob should log errors instead of warnings during import of the transfer history

Current Situation

• The SOSFTPHistoryJob logs a warning if an error occurs during import of the transfer history.
• Example:

  2013-04-10 13:12:35.796 [WARN]   (Task scheduler_sosftp_import:4237553) error occurred importing order : sos.ftphistory.job.SOSFTPHistoryJob.importLine(703) : parameter [remote_host] can't be empty
  

Desired Behavior

• The job should raise an error instead of a warning.