RFR: 8302822: Method/Field/Constructor/RecordComponent::getGenericInfo() is not thread safe [v2]

[liach]

> 8302822: Method/Field/Constructor/RecordComponent::getGenericInfo() is not thread safe

liach has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Make the repositories volatile like in Class
 - Merge branch 'master' of https://git.openjdk.java.net/jdk into generic-info-thread-safe
 - Merge branch 'master' of https://git.openjdk.java.net/jdk into generic-info-thread-safe
 - 8302822: Method/Field/Constructor/RecordComponent::getGenericInfo() is not thread safe

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12643/files
  - new: https://git.openjdk.org/jdk/pull/12643/files/f8e05eff..85f2f350

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12643&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12643&range=00-01

  Stats: 147955 lines in 2252 files changed: 106276 ins; 22901 del; 18778 mod
  Patch: https://git.openjdk.org/jdk/pull/12643.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12643/head:pull/12643

PR: https://git.openjdk.org/jdk/pull/12643