[findbugs] Address "Exposed internal representation" warnings
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Key: HBASE-5647
URL: https://issues.apache.org/jira/browse/HBASE-5647
Project: HBase
Issue Type: Sub-task
Reporter: Jonathan Hsieh
See
https://builds.apache.org/job/PreCommit-HBASE-Build/1313//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
This class of warning may need to be fixed or excluded. Fix or justify +
exclude.
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