Review request for JMC-6458: Backporting the upgrade to Eclipse 2019-03.

[Marcus Hirt]

Hi all,

Please review this request for back-porting the upgrade to Eclipse 2019-03
(with related changes) to JMC 7.0.0 (the jmc7 repo).

Jira:   https://bugs.openjdk.java.net/browse/JMC-6458
Webrev: http://cr.openjdk.java.net/~hirt/JMC-6458/webrev.2/

Kind regards,
Marcus