RFR: 8264734: Some SA classes could use better hashCode() implementation [v3]

[Mitsuru kariya]

On Sun, 2 May 2021 16:07:26 GMT, Mitsuru kariya <github.com+2217224+kariya-mitsuru at openjdk.org> wrote:

>> The current `hashCode` implementation of SA's Address subclasses ignores the upper 32 bits of the long value.
>> This PR changes to use `Long.hashCode` instead.
>
> Mitsuru kariya has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add some more SA's classes

I have changed the title of this PR but I cannot change the title of issue JDK-8264734.
Would it have been better if I hadn't changed the title?

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PR: https://git.openjdk.java.net/jdk/pull/3522