RFR: 8153005: Upgrade the default PKCS12 encryption/MAC algorithms [v4]

[Weijun Wang]

> Default algorithms are bumped to be based on PBES2 with AES-256 and SHA-256. Please also review the CSR at https://bugs.openjdk.java.net/browse/JDK-8228481.

Weijun Wang 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 five additional commits since the last revision:

 - simplify test
 - merge
 - update README and exclude README
 - change ic to 10000
 - 8153005: Upgrade the default PKCS12 encryption/MAC algorithms

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/473/files
  - new: https://git.openjdk.java.net/jdk/pull/473/files/41be78aa..31a22fd4

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=473&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=473&range=02-03

  Stats: 401475 lines in 1918 files changed: 365145 ins; 23887 del; 12443 mod
  Patch: https://git.openjdk.java.net/jdk/pull/473.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/473/head:pull/473

PR: https://git.openjdk.java.net/jdk/pull/473