[jdk11u-dev] RFR: 8314830: runtime/ErrorHandling/ tests ignore external VM flags

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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Commit messages:
 - Backport b685ee00b273f029aa2ed5015e64cf409b0b0408
 - Backport b685ee00b273f029aa2ed5015e64cf409b0b0408

Changes: https://git.openjdk.org/jdk11u-dev/pull/2508/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2508&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314830
  Stats: 31 lines in 15 files changed: 16 ins; 1 del; 14 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2508.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2508/head:pull/2508

PR: https://git.openjdk.org/jdk11u-dev/pull/2508