RFR: 8269909: getStack method in hprof.parser.Reader should use try-with-resource [v3]

[Lin Zang]

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

Lin Zang has updated the pull request incrementally with one additional commit since the last revision:

  revise code to handle the closing of embeded streams

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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/161ab172..36a30d84

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4717&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4717&range=01-02

  Stats: 14 lines in 1 file changed: 4 ins; 0 del; 10 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