RFR: 8269909: getStack method in hprof.parser.Reader should use try-with-resource [v2]

[Lin Zang]

> 8269909: getStack method in hprof.parser.Reader should use try-with-resource

Lin Zang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into try
 - 8269909: getStack method in hprof.parser.Reader should use try-with-resource

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4717/files
  - new: https://git.openjdk.java.net/jdk/pull/4717/files/f2ef4460..161ab172

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4717&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4717&range=00-01

  Stats: 1780 lines in 49 files changed: 894 ins; 752 del; 134 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4717.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4717/head:pull/4717

PR: https://git.openjdk.java.net/jdk/pull/4717