[lworld] Integrated: [lworld] Re-adjust problem list

[Tobias Hartmann]

Undoing the problem listing because:
- `TestZGCUnrolling.java` was already disabled with the changes for [JDK-8331538](https://bugs.openjdk.org/browse/JDK-8331538)
- `TestBasicFunctionality.java` is a large and important test. Only the failing unit test should be disabled. Also, the linked bug is wrong, it should be [JDK-8315003](https://bugs.openjdk.org/browse/JDK-8315003).
- The `TestValueClasses.java` failure seems to be highly intermittent and we should not disable the test completely. I'll investigate with [JDK-8331909](https://bugs.openjdk.org/browse/JDK-8331909) and potentially problem list the unit test.

Thanks,
Tobias

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

Commit messages:
 - [lworld] Re-adjusted problem list

Changes: https://git.openjdk.org/valhalla/pull/1102/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1102&range=00
  Stats: 8 lines in 2 files changed: 3 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1102.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1102/head:pull/1102

PR: https://git.openjdk.org/valhalla/pull/1102