[498599] Add WTP.setup as container of child setups

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=498599


Change-Id: Id6c770cf66ab7a6d28c43eaede0fa5215f92c0a8
Signed-off-by: Esteban DUGUEPEROUX <esteban.dugueperoux@gmail.com>