Amend HBASE-12156 TableName cache isn't used for one of valueOf methods; make TestTableName a medium test
HBASE-12170 TestReplicaWithCluster.testReplicaAndReplication timeouts
HBASE-12166 TestDistributedLogSplitting.testMasterStartsUpWithLogReplayWork
HBASE-12104 Some optimization and bugfix for HTableMultiplexer (Yi Deng)