[jdk11u-dev] RFR: 8289077: Add manual tests to open

[Andrew Lu]

I backport this for parity with 11.0.21-oracle.

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Commit messages:
 - Backport 787e16bb444ee3b63803f5d1701d0f0a68b5d474

Changes: https://git.openjdk.org/jdk11u-dev/pull/2102/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2102&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289077
  Stats: 945 lines in 7 files changed: 945 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2102.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2102/head:pull/2102

PR: https://git.openjdk.org/jdk11u-dev/pull/2102