sar output - add LANGUAGE support

[Pitterling]

currently only "english" sar outputs are supported - this is independend form the date/time formats.
language influences how Summary/Average lines are written to the sar files.

These lines must be filtered out, to avoid errors in later processing. A simple workaround would be to list all translations ...

ksar/src/main/java/net/atomique/ksar/parser/Linux.java

Lines 32 to 34 in 9a6cabe

	private final HashSet<String> IgnoreLinesBeginningWith = new HashSet<>(Arrays.asList(
	"Average:", "##", "Summary", "Summary:"));

  private final HashSet<String> IgnoreLinesBeginningWith = new HashSet<>(Arrays.asList(
      "##",
      "Average:", "Summary:", "Summary",  // en.po
      "Moyenne :", "Résumé:",         // fr.po
      "Durchschn.:", "Zusammenfassung:"   // de.po
  ));

but there are a lot of translations ..
https://translationproject.org/domain/sysstat.html
https://github.com/sysstat/sysstat/tree/master/nls

Another approach could be to include the translation *.po files and extract the corresponding msgid values:
msgid "Average:"
msgid "Summary:"