RFR: 8274393: Suppress more warnings on non-serializable non-transient instance fields in security libs [v2]

[Joe Darcy]

> Follow-up change to JDK-8231262, augmentations to javac's Xlint:serial checking are out for review (#5709) and various security libraries would need some changes to pass under the expanded checks.
> 
> The changes are to suppress warnings where non-transient fields in serializable types are not declared with a type statically known to be serializable. That isn't necessarily a correctness issues, but it does merit further scrutiny.

Joe Darcy 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:

 - Add explanatory comments for SuppressWarnings annotations.
 - Merge branch 'master' into JDK-8274393
 - 8274393: Suppress more warnings on non-serializable non-transient instance fields in security libs

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5720/files
  - new: https://git.openjdk.java.net/jdk/pull/5720/files/5d95dea7..08718270

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5720&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5720&range=00-01

  Stats: 4821 lines in 185 files changed: 3414 ins; 967 del; 440 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5720.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5720/head:pull/5720

PR: https://git.openjdk.java.net/jdk/pull/5720