[INTERNAL] renamed threads

Prefixed by dpp.

Change-Id: I98f334339cc72d833ab40563f8785987b4480ed4
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1943
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>
[LOG] changed logging statements in ActivitySequencer

Change-Id: Ib53bac8ba1294af419a605233fb671a7171b8cf7
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1944
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>