RFR: 8274392: Suppress more warnings on non-serializable non-transient instance fields in java.sql.rowset [v2]

[Joe Darcy]

> Follow-up change to JDK-8231442, augmentations to javac's Xlint:serial checking are out for review (#5709) and java.sql.rowset 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 incrementally with one additional commit since the last revision:

  Update copyrights.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5719/files
  - new: https://git.openjdk.java.net/jdk/pull/5719/files/70747989..f0faf468

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5719&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5719&range=00-01

  Stats: 5 lines in 5 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5719.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5719/head:pull/5719

PR: https://git.openjdk.java.net/jdk/pull/5719