RFR: 8315990: Amend PL tests to proper category

[Prasanta Sadhukhan]

Few awt problem listed tests are placed in swing category which should be amended

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

Commit messages:
 - Amend PL tests to proper category

Changes: https://git.openjdk.org/jdk/pull/15655/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15655&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315990
  Stats: 16 lines in 1 file changed: 9 ins; 7 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15655.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15655/head:pull/15655

PR: https://git.openjdk.org/jdk/pull/15655