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

[Daniel Fuchs]

On Wed, 1 Dec 2021 14:47:54 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

Changes look reasonable to me but since I am not familiar with all those files it might be best to get at least one additional reviewer.

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Marked as reviewed by dfuchs (Reviewer).

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