RFR: 8277474: jarsigner does not check if algorithm parameters are disabled

[Hai-May Chao]

This fixes jarsigner to enforce checking against algorithm constraint properties so when the signature algorithms parameters use disabled or legacy algorithms, it will emit warnings accordingly. If the algorithm used in parameters is disabled, jarsigner treats the jar as unsigned.

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Commit messages:
 - 8277474: jarsigner does not check if algorithm parameters are disabled
 - Testcase updated
 - 8265765: DomainKeyStore may stop enumerating aliases if a constituting KeyStore is empty

Changes: https://git.openjdk.java.net/jdk/pull/7580/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7580&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277474
  Stats: 256 lines in 5 files changed: 240 ins; 3 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7580.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7580/head:pull/7580

PR: https://git.openjdk.java.net/jdk/pull/7580