bug 451562: Splashscreen should not show percentage when task is
completed. 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=451562
Change-Id: I71fe49ff04a0aa0fc47d5af9080e172b5275eaa0
Signed-off-by: Judith Gull <jgu@bsiag.com>
Reviewed-on: https://git.eclipse.org/r/36483
Tested-by: Hudson CI