RFR: CODETOOLS-7903006: Upgrade jtreg plugin to IntelliJ 2021.2

[Thomas Stuefe]

On Tue, 24 Aug 2021 10:48:12 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> Isn't this a dup of https://git.openjdk.java.net/jtreg/pull/19 ?

I could have sworn I checked the mailing list before opening the PR. Ah well. I'll close this one then,

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PR: https://git.openjdk.java.net/jtreg/pull/20