kie-issues#685: DMN Editor: Import Java Classes button is not enabled

[yesamer]

Closes: apache/incubator-kie-issues#685

• In the build.properties file, the source key was incidentally changed here to ource. That was the reason for the issue
• Removed any reference to the old Annotation previously mandatory to enable the feature.
• Updated JDT.LS to 1.29
• Updated freemarker
• Removed generated Java Autocompletion jar in BPMN Editor: not used here, it doesn't make sense to add it.

[yesamer]

@tiagobento @Josephblt I don't understand why is failing here:

.../kie-sandbox-extended-services-image build:dev: cp: cannot stat '../extended-services-java/dist/extended-services-java': No such file or directory

It fails in my local too. Can you please doublecheck?

[Josephblt]

Hello @yesamer. I'm not home today. I'll check it tomorrow. As soon as I have something I'll get back to you.

[Josephblt]

Hello @yesamer. Here is the fix for the failing builds in your PR.
https://github.com/kiegroup/kie-tools/pull/2050
As soon as it gets merged, I'll let you know and you can rerun the builds.

[yesamer]

Hello @yesamer. Here is the fix for the failing builds in your PR. #2050 As soon as it gets merged, I'll let you know and you can rerun the builds.

Thank you @Josephblt