RFR: 8268967: Update java.security to use switch expressions

[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

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

Changes: https://git.openjdk.java.net/jdk/pull/4553/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4553&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268967
  Stats: 107 lines in 3 files changed: 0 ins; 61 del; 46 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