RFR: JDK-8285263 Minor cleanup could be done in java.security [v4]

[Mark Powers]

> https://bugs.openjdk.java.net/browse/JDK-8285263 Minor cleanup could be done in java.security
> 
> JDK-8273046 is the umbrella bug for this bug. The changes were too large for a single code review, so it was decided to split into smaller chunks. This is one such chunk: 
> 
> open/src/java.base/share/classes/java/security

Mark Powers has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:

 - fourth iteration
 - Merge
 - Merge
 - third iteration
 - Merge
 - Merge
 - second iteration
 - Merge
 - Merge
 - first iteration

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

Changes: https://git.openjdk.java.net/jdk/pull/8319/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8319&range=03
  Stats: 628 lines in 95 files changed: 25 ins; 140 del; 463 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8319.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8319/head:pull/8319

PR: https://git.openjdk.java.net/jdk/pull/8319