[jdk11u-dev] RFR: 8214003: Limit default test jobs based on memory size [v2]

[George Adams]

> This patch was partially backported in https://github.com/openjdk/jdk11u-dev/commit/abcacaefe01e427c7a643b578479e3aedd0b6949. This PR adds the remaining patch to `make/RunTests.gmk`.
> 
> This backport is a prerequisite to backporting https://github.com/openjdk/jdk/commit/753c58b7f556fedd7828da487a34b8b228785ff9

George Adams has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

-------------

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1307/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1307/files/8e348a6c..8e348a6c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1307&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1307&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1307.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1307/head:pull/1307

PR: https://git.openjdk.org/jdk11u-dev/pull/1307