This function writes a simple message to terminal and logfile,
        when a run set is skipped.
        There is no message about skipping a run set in the xml-file.

def output_for_skipping_run_set(self, runSet, reason=None):
        '''
        This function writes a simple message to terminal and logfile,
        when a run set is skipped.
        There is no message about skipping a run set in the xml-file.
        '''

        # print to terminal
        util.printOut("\nSkipping run set" +
               (" '" + runSet.name + "'" if runSet.name else "") +
               (" " + reason if reason else "")
              )

        # write into txt_file
        runSetInfo = "\n\n"
        if runSet.name:
            runSetInfo += runSet.name + "\n"
        runSetInfo += "Run set {0} of {1}: skipped {2}\n".format(
                runSet.index, len(self.benchmark.run_sets), reason or "")
        self.txt_file.append(runSetInfo)