RFR: 8266225: jarsigner is using incorrect security property to show weakness of certs

[Hai-May Chao]

Please review the change to jarsigner so it uses certpath security property in order to properly display the weakness of the certificate algorithms.

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Commit messages:
 - 8266225:jarsigner is using incorrect security property to show weakness of certs

Changes: https://git.openjdk.java.net/jdk/pull/3905/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3905&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266225
  Stats: 39 lines in 2 files changed: 31 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3905.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3905/head:pull/3905

PR: https://git.openjdk.java.net/jdk/pull/3905