Added seom debug output and adjusted the refreshment of the page for
execution.
Removed bug, where an Entity was read before the request status was
checked.

Change-Id: I27aee7522fc2b5b60b481b8b7531ab61e040aa0e
Signed-off-by: d061465 <p.merkert@sap.com>
Extracted the converting for an ScenarioInstance into sub routines.

Change-Id: I6f6db901cb8433cb0e53d9e2dc92d08065bded6d
Signed-off-by: d061465 <p.merkert@sap.com>