RFR: 8257858: [macOS]: Remove JNF dependency from libosxsecurity/KeystoreImpl.m [v3]

[Weijun Wang]

On Sat, 30 Jan 2021 00:06:51 GMT, Phil Race <prr at openjdk.org> wrote:

>> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   phil comment
>
> Marked as reviewed by prr (Reviewer).

Added a test. Unfortunately it has to be `manual` because updating the dynamic store needs `sudo` privilege.

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PR: https://git.openjdk.java.net/jdk/pull/1845