Amend HBASE-11251 Attempt grants during tests only when security is enabled
HBASE-11253 IntegrationTestWithCellVisibilityLoadAndVerify failing since HBASE-10326 (Anoop Sam John)
HBASE-11096 stop method of Master and RegionServer coprocessor is not invoked (Qiang Tian)
Update CHANGES.txt for 0.98.3RC1
Merge remote-tracking branch 'remotes/origin/0.98' into 0.98