RFR: 8333364: Minor cleanup could be done in com.sun.crypto.provider

[Mark Powers]

https://bugs.openjdk.org/browse/JDK-8333364

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Commit messages:
 - second iteration
 - first iteration

Changes: https://git.openjdk.org/jdk/pull/19535/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19535&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333364
  Stats: 413 lines in 48 files changed: 47 ins; 102 del; 264 mod
  Patch: https://git.openjdk.org/jdk/pull/19535.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19535/head:pull/19535

PR: https://git.openjdk.org/jdk/pull/19535