RFR: JDK-8284851 Update javax.crypto files to use proper javadoc for mentioned classes [v3]

[Mark Powers]

> https://bugs.openjdk.org/browse/JDK-8284851

Mark Powers has updated the pull request incrementally with one additional commit since the last revision:

  Valerie fix continued

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9282/files
  - new: https://git.openjdk.org/jdk/pull/9282/files/eadba29f..8cef9b66

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9282&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9282&range=01-02

  Stats: 889 lines in 78 files changed: 31 ins; 0 del; 858 mod
  Patch: https://git.openjdk.org/jdk/pull/9282.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9282/head:pull/9282

PR: https://git.openjdk.org/jdk/pull/9282