[jfx-tests] RFR: JDK-8315409: Fix jfx-tests so they work with latest jfx build

[Alexandre Iline]

JDK-8315409: Fix jfx-tests so they work with latest jfx build

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Commit messages:
 - JDK-8315409: Fix jfx-tests so they work with latest jfx build

Changes: https://git.openjdk.org/jfx-tests/pull/1/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx-tests&pr=1&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315409
  Stats: 27068 lines in 465 files changed: 1886 ins; 22848 del; 2334 mod
  Patch: https://git.openjdk.org/jfx-tests/pull/1.diff
  Fetch: git fetch https://git.openjdk.org/jfx-tests.git pull/1/head:pull/1

PR: https://git.openjdk.org/jfx-tests/pull/1