[LOG] enabling detailed logging is now done by Saros

The STF no longer changes the log details of Saros.

Change-Id: I52adeb63c1f8ccc45dc6dbf77a69763e694d257c
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/2000
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>