Removes console output from GraphDatabaseServiceTest
Fixes XaLogicalLog shutdown issue

XaLogicalLog.close() was flushing the store files after
 marking the active log file as applied. This could
 lead to recovery not happening if shutdown
 failed within a narrow window between log
 shutdown and store flush. This is now fixed.
The LogBackedXaDatasource defined a stop() method that
 managed log lifecycle without having to. This is now
 removed and log lifecycle control is delegated to
 subclasses through XaContainer.
Merge pull request #3229 from digitalstain/1.9-fix-llog-shutdown

[1.9] fix logical log shutdown