[11u] RFR: 8262163: Extend settings printout in jcmd VM.metaspace

[Thomas Stüfe]

Hi,

may I please have reviews for this trivial backport. This just adds some
useful small output lines to the VM.metaspace jcmd.

Original issue: https://bugs.openjdk.java.net/browse/JDK-8262163
Original Patch: https://github.com/openjdk/jdk/commit/ea48a0bb.diff

The original patch does not apply, the code moved. Also,
"MetaspaceReclaimPolicy" does not exist in JDK 11 (came with JEP 387).

11u Patch:
http://cr.openjdk.java.net/~stuefe/webrevs/backports/8262163-extend-settings-printout-in-jcmd-VM.metaspace-11u.diff

Thank you, Thomas