RFR: 6909: Upgrade to Eclipse 2020-09 [v2]

[Marcus Hirt]

On Tue, 22 Sep 2020 20:29:39 GMT, Alex Macdonald <aptmac at openjdk.org> wrote:

>> Marked as reviewed by ghb (Reviewer).
>
> The current build failures are because `application/pom.xml` contains `-XX:+UnlockCommercialFeatures` in the
> `jfr.vmargs` that gets used by jfr-related unit tests. [0]
> However, the fix for jdk11 isn't as easy as just removing that arg, because the unit tests that use JFR were set-up for
> an older version it would appear, and formatting causes many tests to fail:
> https://api.travis-ci.org/v3/job/699425288/log.txt  [0]
> https://github.com/openjdk/jmc/blob/master/application/pom.xml#L49

Yups. Will be taking a closer look as soon as I find a few minutes of peace and quiet.

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PR: https://git.openjdk.java.net/jmc/pull/111