[code-reflection] RFR: Test java version check we do in op building methods

[Mourad Abbay]

Write test to make sure java version check we do before building models is working.
There are other options to do the test, one in particular is passing the java compile time version as option and update the OpBuilder to accept the feature version we test against.

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

Commit messages:
 - Write test for $checkJavaVersion

Changes: https://git.openjdk.org/babylon/pull/748/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=748&range=00
  Stats: 115 lines in 1 file changed: 115 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/748.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/748/head:pull/748

PR: https://git.openjdk.org/babylon/pull/748