[jdk11u-dev] RFR: 8209549: remove VMPropsExt from TEST.ROOT

[Amos Shi]

Backport of [JDK-8209549](https://bugs.openjdk.org/browse/JDK-8209549)

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Commit messages:
 - Backport 610dfb22d3eab9bd92a733c06b1d54888d28e446

Changes: https://git.openjdk.org/jdk11u-dev/pull/2317/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2317&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8209549
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2317.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2317/head:pull/2317

PR: https://git.openjdk.org/jdk11u-dev/pull/2317