HPCC-8811 Return WUIDs in WsWorkunits/WUResubmit soap response

The existing soap response of WsWorkunits/WUResubmit returns an
empty response. This fix adds WUIDs into the response. If a new
WU is created by a Resubmit, the response returns both original
WUID and new WUID.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>