Fix data sources and data sinks with splits #766

Fix for issue (#766 | FLINK-766).

DataSource displays processed input splits. DataSink is not displaying output, though.

---------------- Imported from GitHub ----------------
Url: https://github.com/stratosphere/stratosphere/pull/899
Created by: tobwiens
Labels:
Created at: Mon Jun 02 17:31:37 CEST 2014
State: closed