RFR: 7116: Updating to 8.1.0 [v3]

[Guru Hb]

On Fri, 22 Jan 2021 22:36:57 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> Funnily enough, the revision pattern doesn't work on core, since the pom in the .m2 repo for the core components will contain the unexpanded revision variable. Didn't have time to figure out why or a workaround. This PR at least improves matters a little bit.
>
> Marcus Hirt has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Ignoring flattened poms
>  - Flattening poms

changes looks good to me.

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Marked as reviewed by ghb (Reviewer).

PR: https://git.openjdk.java.net/jmc/pull/206