RFR: 8285405: add test and check for negative argument to HashMap::newHashMap et al [v3]

[Jaikiran Pai]

On Fri, 10 Jun 2022 08:26:02 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> Can I please get a review of this change which addresses https://bugs.openjdk.java.net/browse/JDK-8285405?
>> 
>> I've added the test for `LinkedHashMap.newLinkedHashMap(int)` in the existing `test/jdk/java/util/LinkedHashMap/Basic.java` since that test has tests for various APIs of this class.
>> 
>> For `WeakHashMap.newWeakHashMap` and `HashMap.newHashMap`, I have created new test classes under relevant locations, since these classes already have test classes (almost) per API/feature in those locations.
>
> Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add newline at the end of the new file

Work is in progress, I'll be reviving this shortly.

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PR: https://git.openjdk.org/jdk/pull/9036