RFR: 8255982: Extend BasicJMapTest to test with different GC Heap [v5]

[Igor Ignatyev]

On Wed, 11 Nov 2020 15:42:36 GMT, Lin Zang <lzang at openjdk.org> wrote:

>> The implementation of jmap tool depends on the implementation of object iteration by different GC heap.
>> This patch extend the BasicJMapTest to cover differet GC Heap.
>
> Lin Zang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   recover build tag configuration

Marked as reviewed by iignatyev (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1094