Bug 575643 - omit "null" in Status without exception

It is getting logged in
org.eclipse.tea.core.TaskExecutionContext#execute

Change-Id: Id89b49167cc0a2b11885376dae36d71b43c3c1ee
Signed-off-by: Joerg Kubitz <jkubitz-eclipse@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.bundles/+/184448
Tested-by: Lars Vogel <Lars.Vogel@vogella.com>
Tested-by: Equinox Bot <equinox-bot@eclipse.org>
Reviewed-by: Lars Vogel <Lars.Vogel@vogella.com>
1 file changed