RFR: 8273236: keytool does not accurately warn about algorithms that are disabled but have additional constraints [v3]

[Hai-May Chao]

> `keytool` currently uses a simpler scheme in `DisabledAlgorithmConstraints` class when performing algorithm constraints checks. This change is to enhance `keytool` to make use of the new methods `DisabledAlgorithmConstraints.permits` with `CertPathConstraintsParameters` and `checkKey` parameters. For the keyusage in the EE certificate of a certificate chains, set the variant accordingly when calling `CertPathConstraintsParameters` constructor.

Hai-May Chao has updated the pull request incrementally with one additional commit since the last revision:

  Revert changes to DisabledAlgorithmConstraints.java

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7039/files
  - new: https://git.openjdk.java.net/jdk/pull/7039/files/a05728a7..dffb512d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7039&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7039&range=01-02

  Stats: 10 lines in 1 file changed: 0 ins; 6 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7039.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7039/head:pull/7039

PR: https://git.openjdk.java.net/jdk/pull/7039