RFR: 8210955: DOMTest::testEventListenerCascade fails

[Arun Joseph]

Modified the test to work with WebView's ordering of capturing and bubbling event listeners.

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Commits:
 - cbef0069: DOMTest::testEventListenerCascade fails

Changes: https://git.openjdk.java.net/jfx/pull/46/files
 Webrev: https://webrevs.openjdk.java.net/jfx/46/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8210955
  Stats: 4 lines in 1 file changed: 0 ins; 2 del; 2 mod
  Patch: https://git.openjdk.java.net/jfx/pull/46.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/46/head:pull/46

PR: https://git.openjdk.java.net/jfx/pull/46