RFR: 8315283: JFR public method consumer.RecordedClass.getId() has no test coverage

[Erik Gahlin]

Hi,

Could I have a review of an enhancement that adds test coverage to the RecordedClass. A bug was discovered, but it will be handled separately, see [JDK-8321220](https://bugs.openjdk.org/browse/JDK-8321220)

Testing: jdk/jdk/jfr/api/consumer/TestRecordedClass.java

Thanks
Erik

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

Commit messages:
 - Fix formatting
 - Fix formatting
 - Revert accidental change to TestRecordedClassLoader.java
 - Initial

Changes: https://git.openjdk.org/jdk/pull/16935/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16935&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315283
  Stats: 117 lines in 1 file changed: 117 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16935.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16935/head:pull/16935

PR: https://git.openjdk.org/jdk/pull/16935