Integrated: 8240903: Add test to check that jmod hashes are reproducible

[Dongbo He]

On Fri, 25 Mar 2022 01:50:04 GMT, Dongbo He <dongbohe at openjdk.org> wrote:

> This creates a regression test for [JDK-8240734](https://bugs.openjdk.java.net/browse/JDK-8240734). This was once blocked 
> by a time stamp issue which has been resolved by: [JDK-8276766 ](https://bugs.openjdk.java.net/browse/JDK-8276766)
> 
> We found the issue can be produced stably with at least 64 modules.
> Note that we need to add the --date jmod option to avoid the timestamp issue.
> 
> Testing:
> Added test case fails without fix for JDK-8240734, and passes otherwise.
> Tested with tier2 on linux x86.

This pull request has now been integrated.

Changeset: 96952834
Author:    Dongbo He <dongbohe at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/9695283458c273c2a4121f88a2a971ad4f297d5b
Stats:     135 lines in 1 file changed: 135 ins; 0 del; 0 mod

8240903: Add test to check that jmod hashes are reproducible

Reviewed-by: alanb

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PR: https://git.openjdk.java.net/jdk/pull/7948