RFR: 8280948: [TESTBUG] Write a regression test for JDK-4659800 [v6]

[Manukumar V S]

> Write a regression test for JDK-4659800.
> This test checks whether typing 'Enter' key generates ActionEvent on focused Button or not, in Windows and Windows Classic Look And Feels in Windows platform.
> This test is run 10 times on windows and it passed all the times.

Manukumar V S has updated the pull request incrementally with one additional commit since the last revision:

  Fixed review comments: Aligned all stream operations with .stream

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7296/files
  - new: https://git.openjdk.java.net/jdk/pull/7296/files/bbbb0d7e..f1fecef2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7296&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7296&range=04-05

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7296.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7296/head:pull/7296

PR: https://git.openjdk.java.net/jdk/pull/7296