RFR: 8284532: Memory leak in BitSet::BitMapFragmentTable in JFR leak profiler [v3]

[Zhengyu Gu]

> BitSet::BitMapFragmentTable needs a destructor to cleanup its contents to avoid leaking hashtable entries.

Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:

  Fix indentation

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8148/files
  - new: https://git.openjdk.java.net/jdk/pull/8148/files/0ae03a26..c24b6968

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8148&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8148&range=01-02

  Stats: 8 lines in 1 file changed: 1 ins; 1 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8148.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8148/head:pull/8148

PR: https://git.openjdk.java.net/jdk/pull/8148