Remove the use of the deprecated Syncable.sync() method
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Key: MAPREDUCE-3956
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3956
Project: Hadoop Map/Reduce
Issue Type: Improvement
Reporter: Tsz Wo (Nicholas), SZE
Assignee: Tsz Wo (Nicholas), SZE
This is a part of HADOOP-8124.
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