RFR: 8284313: Improve warning messages when CDS archive fails to load [v2]

[Ioi Lam]

On Thu, 11 Aug 2022 22:27:33 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

>> Please review this change for adding more helpful messages when a CDS archive has failed to load without CDS logging being enabled.
>> 
>> e.g. warning for mismatch class paths between dump time and run time:
>> `[warning][cds] shared class paths mismatch (hint: enable -Xlog:class+path=info to diagnose the failure)`
>> 
>> warning if a timestamp of a jar file has been changed during run time:
>> `[warning][cds] app.jar timestamp has changed.`
>> 
>> Passed mach5 tiers 1,2,3 testing.
>
> Calvin Cheung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   comments from David

LGTM

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Marked as reviewed by iklam (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9823