HBASE-8207 Don't use hdfs append during lease recovery

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HBASE-7871 HBase can be stuck when closing regions concurrently (Ted Yu)



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HBASE-8241 Fix the bad dependency on netty from HDFS

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HBASE-7745 Import uses System.out.println instead of logging

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HBASE-7401 Remove warning message about running 'hbase migrate'


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HBASE-8247 inconsistent date format in different logs makes it painful to manipulate them

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