[Rev 01] RFR: 8232524: SynchronizedObservableMap cannot be be protected for copying/iterating

[Robert Lichtenberger]

The pull request has been updated with additional changes.

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

Added commits:
 - 7c5cf198: 8232524: Test cleanup: terminate background thread upon failure.

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/17/files
  - new: https://git.openjdk.java.net/jfx/pull/17/files/7e80839f..7c5cf198

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/17/webrev.01
 - incr: https://webrevs.openjdk.java.net/jfx/17/webrev.00-01

  Issue: https://bugs.openjdk.java.net/browse/JDK-8232524
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/17.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/17/head:pull/17

PR: https://git.openjdk.java.net/jfx/pull/17