RFR: 8307133: Open source some JTable jtreg tests [v2]

[Phil Race]

> Open source some Swing JTable tests

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8307133

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13745/files
  - new: https://git.openjdk.org/jdk/pull/13745/files/19269e2f..44941b91

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13745&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13745&range=00-01

  Stats: 30 lines in 1 file changed: 0 ins; 3 del; 27 mod
  Patch: https://git.openjdk.org/jdk/pull/13745.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13745/head:pull/13745

PR: https://git.openjdk.org/jdk/pull/13745