RFR: 8278028: [test-library] Warnings cleanup of the test library [v3]

[Leonid Mesnik]

On Tue, 14 Dec 2021 15:20:31 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Compilation warnings of the test library introduce noise in test output and should be addressed or suppressed. 
>> Changes include:
>>  - SuppressWarnings("deprecation") and SuppressWarnings("removal")
>>  - Adding type parameters to Raw types
>>  - Adding a hashCode method where equals was already present
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove a test/micro file added by mistake.

Marked as reviewed by lmesnik (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6638