RFR: [lw5] experiment: reusing primitive class tests to generate Q descriptors

[Vicente Romero]

this change add more tests to the experimental code that generates Q descriptors with lw5 syntax

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Commit messages:
 - reusing more primitive classes tests

Changes: https://git.openjdk.org/valhalla/pull/899/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=899&range=00
  Stats: 997 lines in 44 files changed: 58 ins; 759 del; 180 mod
  Patch: https://git.openjdk.org/valhalla/pull/899.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/899/head:pull/899

PR: https://git.openjdk.org/valhalla/pull/899