[INTERNAL] change to runtime.UIMonitoredJob class

Change-Id: Ie8ecb7220e730949f008a54215ba9381da53aef4
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1706
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>