HBASE-10181 HBaseObjectWritable.readObject catches DoNotRetryIOException and wraps it back in a regular IOException

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HBASE-10189 Intermittent TestReplicationSyncUpTool failure (LarsH and Demai Ni)

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HBASE-10179. HRegionServer underreports readRequestCounts by 1 under certain conditions (Perry Trolard)

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CHANGES.txt and pom.xml for 0.94.15RC0

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