[GitHub] Hide auxiliary tasks for iterative data flows in visualization

For iterative data flows, we need to special auxiliary tasks: a fake output task for the iterations tail and another task for synchronizing the execution,

These tasks should be hidden in the visualization.

---------------- Imported from GitHub ----------------
Url: https://github.com/stratosphere/stratosphere/issues/1
Created by: sscdotopen
Labels: enhancement,
Created at: Thu Apr 25 16:51:38 CEST 2013
State: closed