Up versions on historian and keep history of deleted regions for a while rather
than delete immediately
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Key: HBASE-999
URL: https://issues.apache.org/jira/browse/HBASE-999
Project: Hadoop HBase
Issue Type: Improvement
Reporter: stack
Fix For: 0.19.0
Since removal of master logging of all rows of catalog tables, there is a hole
when it comes to debugging what happened in hbase at some time in the past.
The region historian is the place we keep up region history only we've been
deleting old history when region is deleted. Instead, lets not delete region
history but keep it around a while, say a week. Also, keep all versions --
currently its set to 1.
To do this, may need to also so HBASE-998.
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