[jdk11u-dev] RFR: 8307133: Open source some JTable jtreg tests

[Andrew Lu]

I backport this for parity with 11.0.21-oracle.

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Commit messages:
 - Backport 5ca0b08a7505d5c210d906e76c2a4cfc3eed64aa

Changes: https://git.openjdk.org/jdk11u-dev/pull/2065/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2065&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307133
  Stats: 486 lines in 9 files changed: 486 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2065.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2065/head:pull/2065

PR: https://git.openjdk.org/jdk11u-dev/pull/2065