Set version on branch to 0.98.5-SNAPSHOT
HBASE-11561 deprecate ImmutableBytesWritable.getSize and replace with getLength
HBASE-11559 Add dumping of DATA block usage to the BlockCache JSON report (Michael Stack)

Amending-Author: Andrew Purtell <apurtell@apache.org>
HBASE-11566 Make ExportSnapshot extendable by removing 'final'