[jdk11u-dev] RFR: 8280391: NMT: Correct NMT tag on CollectedHeap

[Goetz Lindenmaier]

I backport this for parity with 11.0.19-oracle.

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

Commit messages:
 - Backport 44db4794d29c6e0755a6dc0ea1346f48f918155b

Changes: https://git.openjdk.org/jdk11u-dev/pull/1622/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1622&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8280391
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1622.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1622/head:pull/1622

PR: https://git.openjdk.org/jdk11u-dev/pull/1622