[jfx-tests] RFR: JDK-8315895: Some 3D camera tests fail because of NPE

[Alexandre Iline]

There was a field in a subclass hiding a field in a superclass.

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Commit messages:
 - JDK-8315895: Some 3D camera tests fail because of NPE

Changes: https://git.openjdk.org/jfx-tests/pull/8/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx-tests&pr=8&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315895
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jfx-tests/pull/8.diff
  Fetch: git fetch https://git.openjdk.org/jfx-tests.git pull/8/head:pull/8

PR: https://git.openjdk.org/jfx-tests/pull/8