RFR: 8332551: Test vmTestbase/nsk/monitoring/MemoryNotificationInfo/from/from001/TestDescription.java timed out

[Kevin Walls]

Short version:
Stop testing this test with -Xcomp by adding requires vm.compMode != "Xcomp"

Make additional typo fixes and tidyups while here, it's just shocking.

TestDescription.java contains the test definition, so the "requires" goes there, with a comment.

Updates to from001.java are typos and clarifications, and a changed loop with a poll on a queue rather than block forever.

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Commit messages:
 - update
 - 8332551: Test vmTestbase/nsk/monitoring/MemoryNotificationInfo/from/from001/TestDescription.java timed out

Changes: https://git.openjdk.org/jdk/pull/20146/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20146&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332551
  Stats: 76 lines in 2 files changed: 34 ins; 1 del; 41 mod
  Patch: https://git.openjdk.org/jdk/pull/20146.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20146/head:pull/20146

PR: https://git.openjdk.org/jdk/pull/20146