[jdk11u-dev] RFR: 8283903: GetContainerCpuLoad does not return the correct result in share mode

[xpbob]

Backport a625bfdba45d49bc717bcc9be4112db93b50f50a

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Commit messages:
 - Backport a625bfdba45d49bc717bcc9be4112db93b50f50a

Changes: https://git.openjdk.org/jdk11u-dev/pull/1332/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1332&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8283903
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1332.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1332/head:pull/1332

PR: https://git.openjdk.org/jdk11u-dev/pull/1332