copy job should inform about tguris newly created

right now when copying textgrid:9mxw.0 the source uri is mentioned, but not the (newly created) target uri.

<publishResponse objectListComplete="true">
  <PublishObject uri="textgrid:9mxw.0" status="OK"/>
  <PublishStatus progress="100" processStatus="FINISHED" activeModule="de.langzeitarchivierung.kolibri.actionmodule.textgrid.copy.CopyComplete"/>
</publishResponse>

returning the target uri would be good for automated processing of responses, e.g. would i like to cleanup copied objects created in unit tests ;-)