BLIX-79 implemented BEEP at end of scan, but i09-ws099 does not have
beep setup.
BLIX-78 implemented timestamp print to Jython terminal st scan start and
end if and only if the property 'gda.scanbase.printTimestamp=true'.
Default is not print timestamp so to maintain original behaviour.
Also added notify 'ScanCompltedEvent' at end of scan (BLIX-79)
logical error - toString must take account multiple file path data
return.