HBASE-7617 TestHRegionOnCluster.testDataCorrectnessReplayingRecoveredEdits still fails occasionally.

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1434937 13f79535-47bb-0310-9956-ffa450edef68
HBASE-5458 Thread safety issues with Compression.Algorithm.GZ and CompressionTest

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1435317 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7507 Make memstore flush be able to retry after exception (Chunhui)

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