[FIX] #620 Error Log upload fails 

Change-Id: Ie3050b1a2348ed6e3e862ba2cf6b7d6aecc1172f
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/979
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>