[jdk11u-dev] RFR: 8283276: java/io/ObjectStreamClass/ObjectStreamClassCaching.java fails with various GCs [v3]

[Satyen Subramaniam]

> Backporting JDK-8283276: java/io/ObjectStreamClass/ObjectStreamClassCaching.java fails with various GCs. Adjusting test to be compatible with GCs other than G1. Ran GHA Sanity Checks, local Tier 1 and 2, and adjusted test directly. Patch is **nearly clean**: since `Reference.refersTo` is not supported, needs minor adjustments.

Satyen Subramaniam has updated the pull request incrementally with one additional commit since the last revision:

  Removing whitespace

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Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/3064/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/3064/files/e4503c90..2c75ab72

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3064&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3064&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3064.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3064/head:pull/3064

PR: https://git.openjdk.org/jdk11u-dev/pull/3064