HBASE-9953 PerformanceEvaluation: Decouple data size from client concurrency

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1590216 13f79535-47bb-0310-9956-ffa450edef68
HBASE-11054-Create new hook in StoreScanner to help user creating his own delete tracker (Ram)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1590220 13f79535-47bb-0310-9956-ffa450edef68