RFR: 8257668: SA JMap - skip non-java thread stack dump for heap dump [v2]

[Paul Hohensee]

On Sat, 5 Dec 2020 00:35:27 GMT, Lin Zang <lzang at openjdk.org> wrote:

>> when use SA JMap dump commands, such as "jhsdb jmap --binaryheap" or "dump heap" with "jhsdb clhsdb", it keep printing "dumpStack: not java Thread.". 
>> Skip non-java thread stack dump to avoid printing the message.
>
> Lin Zang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remove deadcode of println instead of change in HeapHprofBinWriter

Marked as reviewed by phh (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1593