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

Tue Sep 22 20:32:24 UTC 2020

On Mon, 21 Sep 2020 14:37:22 GMT, Guru Hb <ghb at openjdk.org> wrote:

>> Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Trying using JDK 11 to launch
>
> 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

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