RFR: 8309761: Leak class loader constraints

[Zhengyu Gu]

Please review this patch to avoid leaking class loader constraints.

-------------

Commit messages:
 - Fix style
 - Merge branch 'master' into leak_loaderConstraint
 - v0

Changes: https://git.openjdk.org/jdk/pull/14407/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14407&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309761
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14407.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14407/head:pull/14407

PR: https://git.openjdk.org/jdk/pull/14407