RFR: 8307143: CredentialsCache.cacheName should not be static [v4]

[Valerie Peng]

On Fri, 12 Apr 2024 14:12:56 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> The CC can be loaded with any file and its name is not static.
>> 
>> `MemoryCredentialsCache` is removed since it's not used anywhere. We've already supported native ccache reading directly with JNI method `Credentials::acquireDefaultNativeCreds`.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   copyright years

Looks good to me, just some nits.

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Marked as reviewed by valeriep (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13737#pullrequestreview-2002345549