RFR: 8298966: Deprecate JMX Subject Delegation and the method JMXConnector.getMBeanServerConnection(Subject) for removal. [v2]

[Kevin Walls]

> Deprecate the Java Management Extension (JMX) Subject Delegation feature for removal in a future release.
> 
> Given no known usage, there is no replacement feature for JMX Subject Delegation.
> 
> CSR is https://bugs.openjdk.org/browse/JDK-8298967

Kevin Walls 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 five additional commits since the last revision:

 - deprecation text update
 - Revert "RMIConnection throw comments"
   
   This reverts commit aceb4fe44189245ac702f0c74c2bb1100a6d17fa.
 - Merge remote-tracking branch 'upstream/master' into Deprecate_SubjectDelegation
 - RMIConnection throw comments
 - 8298966: Deprecate JMX Subject Delegation and the method JMXConnector.getMBeanServerConnection(Subject) for removal.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11880/files
  - new: https://git.openjdk.org/jdk/pull/11880/files/80c5c02d..b1516566

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11880&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11880&range=00-01

  Stats: 149353 lines in 4665 files changed: 68677 ins; 36188 del; 44488 mod
  Patch: https://git.openjdk.org/jdk/pull/11880.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11880/head:pull/11880

PR: https://git.openjdk.org/jdk/pull/11880