GS-11130 new method added to SpaceStatistics, SpaceInstanceStatistics and ProcessingUnitInstanceStatistics: getTimelineFromTimestamp(fromTimestamp), implementation was added to appropriated classes

git-svn-id: svn://pc-lab14/SVN/xap/trunk/openspaces@142106 eb64e737-3616-4df0-8941-5ee2ae88103d