[jdk8u-dev] RFR: 8313083: Print 'rss' and 'cache' as part of the container information

[Jonathan Dowland]

Low risk, Oracle parity. Improves diagnostic output. Includes test modifications to cover the new diagnostics.

Included test `hotspot/test/runtime/containers/docker/TestMisc.java` passes for me.

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/725

Commit messages:
 - remove reporting on tasks
 - 8313083: Print 'rss' and 'cache' as part of the container information

Changes: https://git.openjdk.org/jdk8u-dev/pull/726/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=726&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313083
  Stats: 46 lines in 9 files changed: 45 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/726.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/726/head:pull/726

PR: https://git.openjdk.org/jdk8u-dev/pull/726