RFR: 8253176: Signature.getParameters should specify that it can throw UnsupportedOperationException [v4]

[Valerie Peng]

> This is to update the method javadoc of java.security.Signature.getParameters() with the missing `@throws UnsupportedOperationException`. In addition, the wording on the returned parameters are updated to match those in Cipher and CipherSpi classes. 
> 
> CSR will be filed later.
> 
> Thanks,
> Valerie

Valerie Peng 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:

 - Merge branch 'master' of https://github.com/openjdk/jdk into JDK-8253176
 - Sync'ed w/ the wording in the other Cipher.getParameters() PR.
 - Undo un-intentional changes.
 - 8253176: Signature.getParameters should specify that it can throw UnsupportedOperationException

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8396/files
  - new: https://git.openjdk.java.net/jdk/pull/8396/files/41e76e6e..660adeeb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8396&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8396&range=02-03

  Stats: 135411 lines in 2025 files changed: 115484 ins; 9117 del; 10810 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8396.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8396/head:pull/8396

PR: https://git.openjdk.java.net/jdk/pull/8396