RFR: 8282986: Remove "system" in boot class path names

[Coleen Phillimore]

On Sat, 2 Jul 2022 05:03:04 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> This is a somewhat trivial renaming.  Ran the CDS tests locally.
>
> There are a few remaining places with "system boot class path" in comments and at least one "System boot class path" in an assert message. I don't think the word "system" helps in any of these and maybe it can be dropped.

@AlanBateman thanks for pointing out the additional uses of this in comments and assert messages.

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PR: https://git.openjdk.org/jdk/pull/9349