HBASE-10097 Remove a region name string creation in HRegion#nextInternal

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HBASE-10085: Some regions aren't re-assigned after a master restarts

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HBASE-10061 TableMapReduceUtil.findOrCreateJar calls updateMap(null, ) resulting in thrown NPE (Amit Sela)

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HBASE-10094 Add batching to HLogPerformanceEvaluation

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