RFR: 8296618: Skip failing test SwingNodeDnDMemoryLeakTest until JDK-8285503 is fixed

[Kevin Rushforth]

On Wed, 9 Nov 2022 10:08:28 GMT, pandaapo <duke at openjdk.org> wrote:

> Fixes [JDK-8296618](https://bugs.openjdk.org/browse/JDK-8296618)

Thank you for your offer to contribute. It might be somewhat premature, since we are still looking into whether the test can be fixed soon (in which case we would not want to skip it). See [JDK-8285503](https://bugs.openjdk.org/browse/JDK-8285503). We can leave this PR open until we know one way or the other.

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PR: https://git.openjdk.org/jfx/pull/942