Let c++ handle the iteration data creation

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Wrap new Iteration_data handling

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Adapt changes in integration test

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>