[FIX] Makes MonitorProgressBar finish

Change-Id: I19b1c7cd463743d262bc392661b91d1528325c45
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1966
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>
Tested-by: Jenkins CI
Reviewed-by: Holger Schmeisky <google@schmeisky.com>