[jdk17] RFR: 8269096: Add java.util.Objects.newIdentity method [v3]

[Chris Hegarty]

On Tue, 22 Jun 2021 16:18:11 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Add java.util.Objects.newIdentity to supply a unique object with identity.
>> This is a replacement code can be used today for the traditional new Object() idiom, which will be deprecated under Project Valhalla.
>> Refer to [JEP 401: Primitive Objects (Preview)](https://openjdk.java.net/jeps/401) for background.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright in BasicObjectsTest

Marked as reviewed by chegar (Reviewer).

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PR: https://git.openjdk.java.net/jdk17/pull/112