RFR: 8202667: java/awt/Debug/DumpOnKey/DumpOnKey.java times out on Windows

[Alexander Zuev]

Looks like the problem occurs when system is slow to actually close windows,
then keyboard events are going to the wrong window. The idea of the fix is to
bring the new window to front before actual testing starts and close window
on EDT and then wait for 2 seconds for actual hardware window to disappear.

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Commit messages:
 - 8202667: java/awt/Debug/DumpOnKey/DumpOnKey.java times out on Windows

Changes: https://git.openjdk.java.net/jdk/pull/6194/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6194&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8202667
  Stats: 14 lines in 2 files changed: 10 ins; 1 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6194.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6194/head:pull/6194

PR: https://git.openjdk.java.net/jdk/pull/6194