RFR: 8296671: [JFR] jdk.ContainerConfiguration event should include host total memory

[Severin Gehwolf]

Please review this addition to the jdk.ContainerConfigration event which adds information
about the container host. Specifically, the total amount of memory of the host system.

Testing:
- [x] New test case (passed, fails before)
- [ ] JFR tests (ongoing)

Thoughts?

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

Commit messages:
 - 8296671: [JFR] jdk.ContainerConfiguration event should include host total memory

Changes: https://git.openjdk.org/jdk/pull/11143/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11143&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296671
  Stats: 48 lines in 7 files changed: 43 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/11143.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11143/head:pull/11143

PR: https://git.openjdk.org/jdk/pull/11143