RFR: 8292588: [macos] Multiscreen/MultiScreenLocationTest/MultiScreenLocationTest.java: Robot.mouseMove test failed on Screen #0 [v4]

[Alisen Chung]

> Fixed test bug where mouse location was being calculated before robot mouseMove operation was complete

Alisen Chung has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch 'master' of https://github.com/openjdk/jdk into 8292588/MultiScreenLocationTest
 - added debug statements
 - re-test
 - Merge branch 'master' of https://github.com/openjdk/jdk into 8292588/MultiScreenLocationTest
 - added robot wait to prevent mouse position from being calculated before robot finishes mouseMove

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10363/files
  - new: https://git.openjdk.org/jdk/pull/10363/files/4c8b373a..ef1e22e0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10363&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10363&range=02-03

  Stats: 23599 lines in 1139 files changed: 6709 ins; 4749 del; 12141 mod
  Patch: https://git.openjdk.org/jdk/pull/10363.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10363/head:pull/10363

PR: https://git.openjdk.org/jdk/pull/10363