RFR: 8307297: Move some DnD tests to open [v3]

[Alisen Chung]

> Adding some DnD tests

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  fix space

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13756/files
  - new: https://git.openjdk.org/jdk/pull/13756/files/c2451e28..7d514e47

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13756&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13756&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13756.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13756/head:pull/13756

PR: https://git.openjdk.org/jdk/pull/13756