[jdk19] Integrated: 8278469: Test java/nio/channels/FileChannel/LargeGatheringWrite.java times out

[Brian Burkhalter]

Modify test directives so that `LargeGatheringWrite` and `MapTest` in `java/nio/channels/FileChannel` are not run concurrently with other tests.

Redirected from https://github.com/openjdk/jdk/pull/9416.

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Commit messages:
 - 8278469: Test java/nio/channels/FileChannel/LargeGatheringWrite.java times out

Changes: https://git.openjdk.org/jdk19/pull/122/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=122&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8278469
  Stats: 2 lines in 3 files changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk19/pull/122.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/122/head:pull/122

PR: https://git.openjdk.org/jdk19/pull/122