RFR: 8255013: implement Record Classes as a standard feature in Java, follow-up [v3]

[Vicente Romero]

> Hi,
> 
> I made the mistake of pushing the fix for [JDK-8246774](https://bugs.openjdk.java.net/browse/JDK-8246774) too soon and had to delta-apply it. This PR is basically proposing to push the same code as [PR-290](https://github.com/openjdk/jdk/pull/290),
> 
> Thanks and sorry for the unnecessary loop,
> Vicente

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  removing unnecessary code from classFileParser

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/769/files
  - new: https://git.openjdk.java.net/jdk/pull/769/files/d4fc2572..80a1c282

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=769&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=769&range=01-02

  Stats: 10 lines in 2 files changed: 0 ins; 8 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/769.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/769/head:pull/769

PR: https://git.openjdk.java.net/jdk/pull/769