[jdk11u-dev] RFR: 6849922: java/awt/Choice/ChoiceKeyEventReaction/ChoiceKeyEventReaction.html fails

[Jonathan Dowland]

Backport of [JDK-6849922](https://bugs.openjdk.java.net/browse/JDK-6849922) for jdk11u
Does not apply clean, RFR will be required (ProblemList.txt)
Pre-requisite for [JDK-8214469](https://bugs.openjdk.java.net/browse/JDK-8214469)

Test-only changes, awaiting tier1 test results regardless

Note: the test modified by this patch does *not* pass after applying it, at least on macos -- it does once JDK-8214469 is applied too (that comes next)

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Commit messages:
 - 6849922: java/awt/Choice/ChoiceKeyEventReaction/ChoiceKeyEventReaction.html fails

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/351/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=351&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-6849922
  Stats: 178 lines in 3 files changed: 48 ins; 91 del; 39 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/351.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/351/head:pull/351

PR: https://git.openjdk.java.net/jdk11u-dev/pull/351