RFR: JDK-8340555 : Open source DnD tests - Set4 [v2]

[Harshitha Onkar]

> Following tests are added as part of this PR:
> 
> 1. /java/awt/dnd/DnDHTMLToOutlookTest/DnDHTMLToOutlookTest.java - **Manual PassFailJFrame (PFJ) test**, problemlisted on all platforms.
> 
> 2. java/awt/dnd/DragSourceMotionListenerTest.java -  **Automated test**, problemlisted on windows
> 
> 3. /java/awt/dnd/DragToAnotherScreenTest.java - **Manual PFJ test**
> 
> 4. /java/awt/dnd/RejectDragTest.java - **Automated test**, problemlisted on macOS

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  unused getContent() removed

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21213/files
  - new: https://git.openjdk.org/jdk/pull/21213/files/948c9d14..68f49cc1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21213&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21213&range=00-01

  Stats: 13 lines in 1 file changed: 0 ins; 13 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21213.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21213/head:pull/21213

PR: https://git.openjdk.org/jdk/pull/21213