[jdk11u-dev] RFR: 8315214: Do not run sun/tools/jhsdb tests concurrently

[Matthias Baesken]

Backport 8315214

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Commit messages:
 - Backport 1e7e2bcf3560e1ad39516fb604e4d8bf85bb54e0

Changes: https://git.openjdk.org/jdk11u-dev/pull/2244/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2244&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315214
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2244.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2244/head:pull/2244

PR: https://git.openjdk.org/jdk11u-dev/pull/2244