RFR: 8321902: Robot-based Behavior tests must be under test.robot hierarchy

[Andy Goryachev]

Robot system tests must be in test.robot.* package hierarchy because gradle.

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Commit messages:
 - 8321902: Robot-based Behavior tests must be under test.robot hierarchy

Changes: https://git.openjdk.org/jfx/pull/1306/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1306&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321902
  Stats: 4 lines in 4 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1306.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1306/head:pull/1306

PR: https://git.openjdk.org/jfx/pull/1306