RFR: 8339513: [TestBug] Convert fxml tests to JUnit 5 [v2]

[Ajit Ghaisas]

> This converts FXML module tests to junit5.
> 
> All changes are trivial API replacements from junit4 to junit5.
> There are no parameterized tests in this module.

Ajit Ghaisas has updated the pull request incrementally with one additional commit since the last revision:

  Formatting fixes

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1564/files
  - new: https://git.openjdk.org/jfx/pull/1564/files/40556761..e8ba9561

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1564&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1564&range=00-01

  Stats: 20 lines in 5 files changed: 12 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jfx/pull/1564.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1564/head:pull/1564

PR: https://git.openjdk.org/jfx/pull/1564