RFR: JDK-8281274: deal with ActiveProcessorCount in os::Linux::print_container_info [v4]

[Matthias Baesken]

> The function os::Linux::print_container_info outputs memory- and cpu-related container information (when running in a containerized environment).
> However in the case of active processor count , it currently just outputs the info from OSContainer::active_processor_count without  looking at  ActiveProcessorCount that can be set to overwrite the OSContainer::active_processor_count() - information. This should be improved.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Add separate testPrintContainerInfoActiveProcessorCount, avoid code duplication in Common

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7354/files
  - new: https://git.openjdk.java.net/jdk/pull/7354/files/52fee02c..29352421

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7354&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7354&range=02-03

  Stats: 20 lines in 2 files changed: 11 ins; 5 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7354.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7354/head:pull/7354

PR: https://git.openjdk.java.net/jdk/pull/7354