message: Use kError for the log level only for the filteredTrees task.
  The previous settings were affecting all tasks in the QA and AOD
  trains.
diff: @@ -22,9 +22,7 @@ AliAnalysisTask* AddTaskFilteredTree(TString outputFile="")
  }
  // Switch off all AliInfo (too much output!!!)
  - AliLog::SetGlobalLogLevel(AliLog::kError);
  - mgr->SetDebugLevel(0);
  -
  + AliLog::SetClassDebugLevel("AliAnalysisTaskFilteredTree", AliLog::kError);
  //
  