RFR: 8341633: StatSampler::assert_system_property: Print the keys and values of the assert

[Stefan Karlsson]

On Mon, 7 Oct 2024 11:42:03 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Hi,
> 
> This trivial PR adds that the failing assert also prints the differing values so that we can more easily debug what's wrong when this assert is triggered.
> 
> Thanks.

Marked as reviewed by stefank (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21386#pullrequestreview-2352766123