wait for DLO segments to show up when Close()ing the writer
wait for DLO segments to show up when Close()ing the writer

Not just when Commit()ing the result. This fixes some errors I observed
when the layer (i.e. the DLO) is Stat()ed immediately after closing,
and reports the wrong file size because the container listing is not
yet up-to-date.

Signed-off-by: Stefan Majewsky <23888fbbf34aeec099df058e607cbf00c99a1b6b@sap.com>

thaJeztah/distribution,thaJeztah/distribution