RFR: 8268967: Update java.security to use switch expressions [v2]

[Patrick Concannon]

> Hi,
> 
> Could someone please review my code for updating the code in the `java.security` packages to make use of the switch expressions?
> 
> Kind regards,
> Patrick

Patrick Concannon 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 three additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into JDK-8268967
 - Merge remote-tracking branch 'origin/master' into JDK-8268967
 - 8268967: Update java.security to use switch expressions

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4553/files
  - new: https://git.openjdk.java.net/jdk/pull/4553/files/f94b850d..917d4d26

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4553&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4553&range=00-01

  Stats: 12925 lines in 361 files changed: 3731 ins; 8374 del; 820 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4553.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4553/head:pull/4553

PR: https://git.openjdk.java.net/jdk/pull/4553