RFR: 8225181: KeyStore should have a getAttributes method [v4]

[Weijun Wang]

On Thu, 4 Nov 2021 19:34:50 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Add `KeyStore::getAttributes` so that one can get the attributes of an entry without retrieving the entry first. This is especially useful for a private key entry which can only be retrieved with a password.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   redine spec

New commits pushed. Except for the merge commits, the only change is method spec update to match the text in the approved CSR.

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

PR: https://git.openjdk.java.net/jdk/pull/6026