RFR: 8304924: [testbug] Skip failing tests on Linux

Sat Mar 25 15:56:38 UTC 2023

This PR skips three headful tests on Linux until the issues with the tests can be fixed. These tests consistently fail on our physical Ubuntu 22.04 test machine. This is a step towards getting clean headful test runs. Each of the skipped tests has an associated bug that needs to be fixed.

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Commit messages:
 - 8304924: [testbug] Skip failing tests on Linux

Changes: https://git.openjdk.org/jfx/pull/1068/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1068&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304924
  Stats: 22 lines in 3 files changed: 14 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jfx/pull/1068.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1068/head:pull/1068

PR: https://git.openjdk.org/jfx/pull/1068