Update TestDFSUpgradeFromImage to test batch hardlink improvment
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Key: HDFS-1622
URL: https://issues.apache.org/jira/browse/HDFS-1622
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Hairong Kuang
Matt has done a great job in HDFS-1443 that uses batch link command to improve
datanode upgrade performance. However TestDFSUpgradeImage upgrades from an
image layout of -7 which is too old to test the batch feature. We need to
update this test to use a more recent layout.
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