UPS-RS: Log reason for error responses in server.log with INFO level

[gunterze]

Log reason for error responses of UPS-RS Services:

• POST /dcm4chee-arc/aets/{aet}/rs/workitems - Creates a new Workitem
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/{workitem} - Update existing Workitem
• PUT /dcm4chee-arc/aets/{aet}/rs/workitems/{workitem}/state/{requester} - Change Workitem State
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/{workitem}/cancelrequest/{requester} - Request Cancellation of Workitem
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/{workitem}/subscribers/{subscriber} - Subscribe to Workitem
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/1.2.840.10008.5.1.4.34.5/subscribers/{subscriber} - Subscribe to Worklist
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/1.2.840.10008.5.1.4.34.5.1/subscribers/{subscriber} - Subscribe to Filtered Worklist
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/1.2.840.10008.5.1.4.34.5/subscribers/{subscriber}/suspend - Suspend Subscription from Worklist
• POST /dcm4chee-arc/aets/{aet}/rs/workitems/1.2.840.10008.5.1.4.34.5.1/subscribers/{subscriber}/suspend -
  Suspend Subscription from Filtered Worklist

in server.log with INFO level. In particular log underlying DicomServiceException in server.log.