RFR: 8297296: java/awt/Mouse/EnterExitEvents/DragWindowTest.java fails with "No MouseReleased event on label!" [v2]

[Alisen Chung]

> Test was run on mac, windows, linux 50 times and passed after change
> Before fix, test fails about once every 50 runs on linux and windows platforms

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

  fixed imports, changed robot autodelay and added delay after creating gui

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11425/files
  - new: https://git.openjdk.org/jdk/pull/11425/files/ff6713c3..0e69811d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11425&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11425&range=00-01

  Stats: 20 lines in 1 file changed: 13 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/11425.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11425/head:pull/11425

PR: https://git.openjdk.org/jdk/pull/11425