RFR: 8292955: Collections.checkedMap Map.merge does not properly check key and value [v3]

[Chen Liang]

On Thu, 7 Mar 2024 05:33:16 GMT, Korov <duke at openjdk.org> wrote:

>> When the specified key did not associated with a value, should check the `key` and `value` type.
>
> Korov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use testNG builtin functionalities and modify the test function name

Looks good to me, maybe @stuart-marks can take a look too?

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Marked as reviewed by liach (Author).

PR Review: https://git.openjdk.org/jdk/pull/18141#pullrequestreview-1935750299