[jdk17] RFR: JDK-8268826: Cleanup Override in Context-Specific Deserialization Filters [v2]

[Roger Riggs]

> Remove the unnecessary special case "OVERRIDE" in jdk.serialFilterFactory property.
> Fix description in the example of a filter allowing platform classes.
> Suppress some warnings about use of SecurityManager in tests.

Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:

  Remove jdk.serialFilterFactory "OVERRIDE" special handling.
  Correct description of the example of allowing platform or bootstrap classes in OIF.
  Cleanup of logging of filter tracing.

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

Changes:
  - all: https://git.openjdk.java.net/jdk17/pull/85/files
  - new: https://git.openjdk.java.net/jdk17/pull/85/files/9471e4e0..0add8a1c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17&pr=85&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17&pr=85&range=00-01

  Stats: 61 lines in 6 files changed: 9 ins; 26 del; 26 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/85.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/85/head:pull/85

PR: https://git.openjdk.java.net/jdk17/pull/85