[jdk11u-dev] RFR: 8233712: Limit default tests jobs based on ulimit -u setting [v2]

[George Adams]

> Applies cleanly. This backport is a prerequisite to landing https://github.com/openjdk/jdk11u-dev/pull/1277

George Adams has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:

 - Backport 753c58b7f556fedd7828da487a34b8b228785ff9
 - Repair backport of JDK-8211727

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Changes: https://git.openjdk.org/jdk11u-dev/pull/1308/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1308&range=01
  Stats: 96 lines in 5 files changed: 55 ins; 37 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1308.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1308/head:pull/1308

PR: https://git.openjdk.org/jdk11u-dev/pull/1308