RFR: Rename skara plugins to improve IDE compatibility [v2]

[Erik Helin]

On Mon, 15 Feb 2021 10:35:49 GMT, Robin Westberg <rwestberg at openjdk.org> wrote:

>> Improve IDE support for the latest skara gradle plugin structure.
>
> Robin Westberg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Also rename directories

Looks good, thanks for fixing!

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Marked as reviewed by ehelin (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/1012